diff --git a/.gitignore b/.gitignore
index ea8c4bf..a3bb07f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 /target
+authorize_data/
diff --git a/src/authorize_data/database.db b/src/authorize_data/database.db
index a288a2d..da9065e 100644
Binary files a/src/authorize_data/database.db and b/src/authorize_data/database.db differ
diff --git a/src/db.rs b/src/db.rs
index d1deaf9..3739dd4 100644
--- a/src/db.rs
+++ b/src/db.rs
@@ -14,7 +14,7 @@ pub struct Authorize {
   pub insert_time: String,
 }
 
-pub(crate) struct InsertArgs {
+pub struct InsertArgs {
   pub project: String,
   pub token: String,
   pub device_id: String,
@@ -64,6 +64,24 @@ impl Db {
     Ok(Db { client })
   }
 
+  /// 通过project和device_id查询是否存在数据库
+  pub async fn exists_project(
+    &self,
+    project: &str,
+    device_id: &str,
+  ) -> Result<Option<Authorize>, Box<dyn std::error::Error>> {
+    let row = Authorize::all()
+      .where_col(|a| a.project.equal(project))
+      .where_col(|a| a.device_id.equal(device_id))
+      .limit(1)
+      .run(&self.client)
+      .await?
+      .into_inners()
+      .into_iter()
+      .next();
+    Ok(row)
+  }
+
   /// 判断 token 是否存在
   pub async fn verify_token(
     &self,
diff --git a/src/main.rs b/src/main.rs
index 7c0df36..6d4a176 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -67,7 +67,27 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
 async fn create_token(
   State(state): State<AppState>,
   Query(args): Query<CreateToken>,
-) -> (StatusCode, Json<CreateResult>) {
+) -> (StatusCode, Json<CreateTokenInfo>) {
+  let exists = state
+    .db
+    .exists_project(&args.project, &args.device_id)
+    .await
+    .unwrap();
+  match exists {
+    Some(info) => {
+      return (
+        StatusCode::OK,
+        Json(CreateTokenInfo {
+          code: 404,
+          project: info.project,
+          device_id: info.device_id,
+          token: info.token,
+          msg: "token已存在，请勿重复创建".to_owned(),
+        }),
+      )
+    }
+    None => (),
+  }
   let str_time = get_current_datetime();
   let exp_time = add_day(&str_time, 7).unwrap();
 
@@ -85,11 +105,11 @@ async fn create_token(
 
   (
     StatusCode::OK,
-    Json(CreateResult {
+    Json(CreateTokenInfo {
       code: 200,
       project: args.project,
       device_id: args.device_id,
-      token: token,
+      token,
       msg: "token创建成功".to_owned(),
     }),
   )
@@ -150,15 +170,6 @@ struct CreateToken {
   device_id: String,
 }
 
-#[derive(Serialize)]
-struct CreateResult {
-  code: i16,
-  project: String,
-  device_id: String,
-  token: String,
-  msg: String,
-}
-
 #[derive(Clone)]
 struct AppState {
   db: Arc<db::Db>,
@@ -197,3 +208,12 @@ enum TokenResponse {
   Success(TokenInfo),
   Error(QueryError),
 }
+
+#[derive(Serialize)]
+struct CreateTokenInfo {
+  code: i16,
+  project: String,
+  device_id: String,
+  token: String,
+  msg: String,
+}