diff --git a/pt--frontend/src/api/post.js b/pt--frontend/src/api/post.js
new file mode 100644
index 0000000..9aa47a1
--- /dev/null
+++ b/pt--frontend/src/api/post.js
@@ -0,0 +1,110 @@
+const BASE_URL = 'http://localhost:8080/post';
+
+/**
+ * 创建帖子（带图片）
+ * @param {FormData} formData 包含 userid、post_title、post_content、tags、rannge、is_pinned、photo
+ */
+export const createPost = (formData) => {
+    return fetch(`${BASE_URL}/create`, {
+        method: 'POST',
+        body: formData,
+    }).then(res => res.json());
+};
+
+/**
+ * 删除帖子
+ * @param {number} postid 帖子 ID
+ */
+export const deletePost = (postid) => {
+    return fetch(`${BASE_URL}/delete/${postid}`, {
+        method: 'DELETE',
+    }).then(res => res.json());
+};
+
+/**
+ * 更新帖子（JSON 格式）
+ * @param {Object} post 帖子对象
+ */
+export const updatePost = (post) => {
+    return fetch(`${BASE_URL}/update`, {
+        method: 'PUT',
+        headers: {
+            'Content-Type': 'application/json',
+        },
+        body: JSON.stringify(post),
+    }).then(res => res.json());
+};
+
+/**
+ * 关键词搜索帖子
+ * @param {string} keyword 搜索关键词
+ */
+export const searchPosts = (keyword) => {
+    return fetch(`${BASE_URL}/search?keyword=${encodeURIComponent(keyword)}`)
+        .then(res => res.json());
+};
+
+/**
+ * 点赞帖子
+ * @param {number} postid 帖子 ID
+ */
+export const likePost = (postid) => {
+    return fetch(`${BASE_URL}/like/${postid}`, {
+        method: 'PUT',
+    }).then(res => res.json());
+};
+
+/**
+ * 取消点赞帖子
+ * @param {number} postid 帖子 ID
+ */
+export const unlikePost = (postid) => {
+    return fetch(`${BASE_URL}/unlike/${postid}`, {
+        method: 'PUT',
+    }).then(res => res.json());
+};
+
+/**
+ * 置顶帖子
+ * @param {number} postid 帖子 ID
+ */
+export const pinPost = (postid) => {
+    return fetch(`${BASE_URL}/pin/${postid}`, {
+        method: 'PUT',
+    }).then(res => res.json());
+};
+
+/**
+ * 取消置顶帖子
+ * @param {number} postid 帖子 ID
+ */
+export const unpinPost = (postid) => {
+    return fetch(`${BASE_URL}/unpin/${postid}`, {
+        method: 'PUT',
+    }).then(res => res.json());
+};
+
+/**
+ * 获取某用户所有帖子
+ * @param {number} userid 用户 ID
+ */
+export const findPostsByUserId = (userid) => {
+    return fetch(`${BASE_URL}/findByUserid?userid=${userid}`)
+        .then(res => res.json());
+};
+
+/**
+ * 获取所有置顶帖子
+ */
+export const findPinnedPosts = () => {
+    return fetch(`${BASE_URL}/findPinned`)
+        .then(res => res.json());
+};
+
+/**
+ * 获取所有帖子（排序后）
+ */
+export const getAllPostsSorted = () => {
+    return fetch(`${BASE_URL}/all`)
+        .then(res => res.json());
+};