diff --git a/src/components/admin/ChangePasswordDialog.tsx b/src/components/admin/ChangePasswordDialog.tsx
new file mode 100644
index 0000000..471df04
--- /dev/null
+++ b/src/components/admin/ChangePasswordDialog.tsx
@@ -0,0 +1,204 @@
+import { useState } from "react"
+import { useForm } from "react-hook-form"
+import { z } from "zod/v4"
+import { zodResolver } from "@hookform/resolvers/zod"
+import { Eye, EyeOff } from "lucide-react"
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog"
+import { Button } from "@/components/ui/button"
+import { Input } from "@/components/ui/input"
+import { Label } from "@/components/ui/label"
+import { changePassword } from "@/lib/api/admin-api"
+
+const schema = z
+  .object({
+    currentPassword: z.string().min(1, "请输入当前密码"),
+    newPassword: z.string().min(8, "新密码至少8个字符").max(128, "密码不超过128个字符"),
+    confirmPassword: z.string().min(1, "请确认新密码"),
+  })
+  .refine((d) => d.newPassword === d.confirmPassword, {
+    message: "两次输入的密码不一致",
+    path: ["confirmPassword"],
+  })
+  .refine((d) => d.currentPassword !== d.newPassword, {
+    message: "新密码不能与当前密码相同",
+    path: ["newPassword"],
+  })
+
+type FormValues = z.infer<typeof schema>
+
+interface ChangePasswordDialogProps {
+  open: boolean
+  onOpenChange: (open: boolean) => void
+}
+
+export function ChangePasswordDialog({ open, onOpenChange }: ChangePasswordDialogProps) {
+  const [submitting, setSubmitting] = useState(false)
+  const [serverError, setServerError] = useState("")
+  const [success, setSuccess] = useState(false)
+  const [showCurrent, setShowCurrent] = useState(false)
+  const [showNew, setShowNew] = useState(false)
+
+  const form = useForm<FormValues>({
+    resolver: zodResolver(schema),
+    defaultValues: { currentPassword: "", newPassword: "", confirmPassword: "" },
+  })
+
+  function handleOpenChange(nextOpen: boolean) {
+    if (!nextOpen) {
+      form.reset()
+      setServerError("")
+      setSuccess(false)
+    }
+    onOpenChange(nextOpen)
+  }
+
+  async function handleSubmit(data: FormValues) {
+    setServerError("")
+    setSubmitting(true)
+    try {
+      const res = await changePassword({
+        currentPassword: data.currentPassword,
+        newPassword: data.newPassword,
+      })
+      if (res.success) {
+        setSuccess(true)
+      } else {
+        const code = res.error?.code ?? ""
+        if (code === "UNAUTHORIZED") {
+          setServerError("当前密码错误")
+        } else if (code === "VALIDATION_ERROR") {
+          setServerError(res.error?.message ?? "参数校验失败")
+        } else if (code === "FORBIDDEN") {
+          setServerError("账户已被禁用")
+        } else {
+          setServerError(res.error?.message ?? "修改失败")
+        }
+      }
+    } catch {
+      setServerError("网络错误，请稍后重试")
+    } finally {
+      setSubmitting(false)
+    }
+  }
+
+  return (
+    <Dialog open={open} onOpenChange={handleOpenChange}>
+      <DialogContent>
+        <DialogHeader>
+          <DialogTitle>修改密码</DialogTitle>
+          <DialogDescription>
+            {success ? "密码修改成功" : "修改当前账号的登录密码"}
+          </DialogDescription>
+        </DialogHeader>
+
+        {success ? (
+          <div className="rounded-md border border-green-200 bg-green-50 px-4 py-3 text-sm text-green-800">
+            密码已成功修改，下次登录请使用新密码。
+          </div>
+        ) : (
+          <form onSubmit={form.handleSubmit(handleSubmit)} className="space-y-4">
+            {serverError && (
+              <div className="rounded-md border border-red-200 bg-red-50 px-4 py-3 text-sm text-red-800">
+                {serverError}
+              </div>
+            )}
+
+            <div className="space-y-2">
+              <Label htmlFor="currentPassword">当前密码</Label>
+              <div className="relative">
+                <Input
+                  id="currentPassword"
+                  type={showCurrent ? "text" : "password"}
+                  autoComplete="current-password"
+                  {...form.register("currentPassword")}
+                />
+                <Button
+                  type="button"
+                  variant="ghost"
+                  size="icon-xs"
+                  className="absolute right-1 top-1/2 -translate-y-1/2"
+                  onClick={() => setShowCurrent(!showCurrent)}
+                >
+                  {showCurrent ? <EyeOff className="size-4" /> : <Eye className="size-4" />}
+                </Button>
+              </div>
+              {form.formState.errors.currentPassword && (
+                <p className="text-sm text-destructive">
+                  {form.formState.errors.currentPassword.message}
+                </p>
+              )}
+            </div>
+
+            <div className="space-y-2">
+              <Label htmlFor="newPassword">新密码</Label>
+              <div className="relative">
+                <Input
+                  id="newPassword"
+                  type={showNew ? "text" : "password"}
+                  autoComplete="new-password"
+                  {...form.register("newPassword")}
+                />
+                <Button
+                  type="button"
+                  variant="ghost"
+                  size="icon-xs"
+                  className="absolute right-1 top-1/2 -translate-y-1/2"
+                  onClick={() => setShowNew(!showNew)}
+                >
+                  {showNew ? <EyeOff className="size-4" /> : <Eye className="size-4" />}
+                </Button>
+              </div>
+              {form.formState.errors.newPassword && (
+                <p className="text-sm text-destructive">
+                  {form.formState.errors.newPassword.message}
+                </p>
+              )}
+            </div>
+
+            <div className="space-y-2">
+              <Label htmlFor="confirmPassword">确认新密码</Label>
+              <Input
+                id="confirmPassword"
+                type="password"
+                autoComplete="new-password"
+                {...form.register("confirmPassword")}
+              />
+              {form.formState.errors.confirmPassword && (
+                <p className="text-sm text-destructive">
+                  {form.formState.errors.confirmPassword.message}
+                </p>
+              )}
+            </div>
+
+            <DialogFooter>
+              <Button
+                type="button"
+                variant="outline"
+                onClick={() => handleOpenChange(false)}
+                disabled={submitting}
+              >
+                取消
+              </Button>
+              <Button type="submit" disabled={submitting}>
+                {submitting ? "提交中..." : "确认修改"}
+              </Button>
+            </DialogFooter>
+          </form>
+        )}
+
+        {success && (
+          <DialogFooter>
+            <Button onClick={() => handleOpenChange(false)}>完成</Button>
+          </DialogFooter>
+        )}
+      </DialogContent>
+    </Dialog>
+  )
+}
diff --git a/src/components/layout/Sidebar.tsx b/src/components/layout/Sidebar.tsx
index 9dc967a..6b9dd50 100644
--- a/src/components/layout/Sidebar.tsx
+++ b/src/components/layout/Sidebar.tsx
@@ -1,3 +1,4 @@
+import { useState } from "react"
 import { NavLink, useNavigate } from "react-router"
 import {
   LayoutDashboard,
@@ -12,9 +13,11 @@ import {
   AlertCircle,
   Shield,
   BookMarked,
+  KeyRound,
 } from "lucide-react"
 import { cn } from "@/lib/utils"
 import { useAuth } from "@/hooks/use-auth"
+import { ChangePasswordDialog } from "@/components/admin/ChangePasswordDialog"
 
 const navItems = [
   { to: "/", label: "数据看板", icon: LayoutDashboard, end: true },
@@ -33,6 +36,7 @@ const navItems = [
 export function Sidebar() {
   const { logout } = useAuth()
   const navigate = useNavigate()
+  const [changePasswordOpen, setChangePasswordOpen] = useState(false)
 
   function handleLogout() {
     logout()
@@ -40,41 +44,52 @@ export function Sidebar() {
   }
 
   return (
-    <aside className="flex h-screen w-60 flex-col border-r bg-sidebar-background">
-      <div className="flex h-14 items-center border-b px-4">
-        <span className="text-lg font-semibold">多奇管理后台</span>
-      </div>
+    <>
+      <aside className="flex h-screen w-60 flex-col border-r bg-sidebar-background">
+        <div className="flex h-14 items-center border-b px-4">
+          <span className="text-lg font-semibold">多奇管理后台</span>
+        </div>
 
-      <nav className="flex-1 space-y-1 p-3">
-        {navItems.map(({ to, label, icon: Icon, end }) => (
-          <NavLink
-            key={to}
-            to={to}
-            end={end}
-            className={({ isActive }) =>
-              cn(
-                "flex items-center gap-3 rounded-md px-3 py-2 text-sm font-medium transition-colors",
-                isActive
-                  ? "bg-sidebar-accent text-sidebar-accent-foreground"
-                  : "text-sidebar-foreground/70 hover:bg-sidebar-accent/50 hover:text-sidebar-foreground",
-              )
-            }
+        <nav className="flex-1 space-y-1 p-3">
+          {navItems.map(({ to, label, icon: Icon, end }) => (
+            <NavLink
+              key={to}
+              to={to}
+              end={end}
+              className={({ isActive }) =>
+                cn(
+                  "flex items-center gap-3 rounded-md px-3 py-2 text-sm font-medium transition-colors",
+                  isActive
+                    ? "bg-sidebar-accent text-sidebar-accent-foreground"
+                    : "text-sidebar-foreground/70 hover:bg-sidebar-accent/50 hover:text-sidebar-foreground",
+                )
+              }
+            >
+              <Icon className="h-4 w-4" />
+              {label}
+            </NavLink>
+          ))}
+        </nav>
+
+        <div className="border-t p-3 space-y-1">
+          <button
+            onClick={() => setChangePasswordOpen(true)}
+            className="flex w-full items-center gap-3 rounded-md px-3 py-2 text-sm font-medium text-sidebar-foreground/70 transition-colors hover:bg-sidebar-accent/50 hover:text-sidebar-foreground"
           >
-            <Icon className="h-4 w-4" />
-            {label}
-          </NavLink>
-        ))}
-      </nav>
+            <KeyRound className="h-4 w-4" />
+            修改密码
+          </button>
+          <button
+            onClick={handleLogout}
+            className="flex w-full items-center gap-3 rounded-md px-3 py-2 text-sm font-medium text-sidebar-foreground/70 transition-colors hover:bg-sidebar-accent/50 hover:text-sidebar-foreground"
+          >
+            <LogOut className="h-4 w-4" />
+            退出登录
+          </button>
+        </div>
+      </aside>
 
-      <div className="border-t p-3">
-        <button
-          onClick={handleLogout}
-          className="flex w-full items-center gap-3 rounded-md px-3 py-2 text-sm font-medium text-sidebar-foreground/70 transition-colors hover:bg-sidebar-accent/50 hover:text-sidebar-foreground"
-        >
-          <LogOut className="h-4 w-4" />
-          退出登录
-        </button>
-      </div>
-    </aside>
+      <ChangePasswordDialog open={changePasswordOpen} onOpenChange={setChangePasswordOpen} />
+    </>
   )
 }
diff --git a/src/lib/api/admin-api.ts b/src/lib/api/admin-api.ts
index 7b978bd..fe7df9c 100644
--- a/src/lib/api/admin-api.ts
+++ b/src/lib/api/admin-api.ts
@@ -44,6 +44,24 @@ export async function fetchMe(): Promise<ApiResponse<Admin>> {
   return apiClient.get("auth/me").json<ApiResponse<Admin>>()
 }
 
+// ==================== 修改密码 ====================
+
+/** 修改密码请求 */
+export interface ChangePasswordRequest {
+  currentPassword: string
+  newPassword: string
+}
+
+/**
+ * 修改当前管理员密码
+ * PUT /admin/change-password
+ */
+export async function changePassword(
+  data: ChangePasswordRequest
+): Promise<ApiResponse<{ success: boolean }>> {
+  return apiClient.put("change-password", { json: data }).json<ApiResponse<{ success: boolean }>>()
+}
+
 // ==================== 管理员管理 ====================
 
 /** fetchAdmins 的查询参数 */