diff --git a/server-rs/crates/platform-auth/src/lib.rs b/server-rs/crates/platform-auth/src/lib.rs
index 03898a03a..c20ba0ee4 100644
--- a/server-rs/crates/platform-auth/src/lib.rs
+++ b/server-rs/crates/platform-auth/src/lib.rs
@@ -362,17 +362,45 @@ struct WechatPhoneNumberResponse {
     phone_info: Option<WechatPhoneNumberInfo>,
 }
 
+// 微信成功响应按官方文档必须包含这三个字段：
+// https://developers.weixin.qq.com/miniprogram/dev/server/API/user-info/phone-number/api_getphonenumber.html#Res-phone-info-Object-Payload
 #[derive(Debug, Deserialize)]
 struct WechatPhoneNumberInfo {
-    #[serde(default)]
-    #[serde(alias = "phoneNumber")]
-    phone_number: Option<String>,
-    #[serde(default)]
-    #[serde(alias = "purePhoneNumber")]
-    pure_phone_number: Option<String>,
-    #[serde(default)]
-    #[serde(alias = "countryCode")]
-    country_code: Option<String>,
+    #[serde(rename = "phoneNumber")]
+    phone_number: String,
+    #[serde(rename = "purePhoneNumber")]
+    pure_phone_number: String,
+    #[serde(rename = "countryCode")]
+    country_code: String,
+}
+
+fn normalize_wechat_phone_number_info(
+    phone_info: WechatPhoneNumberInfo,
+) -> Result<WechatPhoneNumberProfile, WechatProviderError> {
+    let pure_phone_number = phone_info.pure_phone_number.trim();
+    if pure_phone_number.is_empty() {
+        return Err(WechatProviderError::MissingProfile(
+            "微信手机号授权失败：缺少纯手机号".to_string(),
+        ));
+    }
+    let country_code = phone_info.country_code.trim();
+    if country_code.is_empty() {
+        return Err(WechatProviderError::MissingProfile(
+            "微信手机号授权失败：缺少国家码".to_string(),
+        ));
+    }
+    let phone_number = phone_info.phone_number.trim();
+    if phone_number.is_empty() {
+        return Err(WechatProviderError::MissingProfile(
+            "微信手机号授权失败：缺少完整手机号".to_string(),
+        ));
+    }
+
+    Ok(WechatPhoneNumberProfile {
+        phone_number: phone_number.to_string(),
+        pure_phone_number: Some(pure_phone_number.to_string()),
+        country_code: Some(country_code.to_string()),
+    })
 }
 
 #[derive(Debug, Deserialize)]
@@ -1118,20 +1146,7 @@ impl RealWechatProvider {
         let phone_info = payload.phone_info.ok_or_else(|| {
             WechatProviderError::MissingProfile("微信手机号授权失败：缺少手机号信息".to_string())
         })?;
-        let phone_number = phone_info
-            .pure_phone_number
-            .clone()
-            .or(phone_info.phone_number.clone())
-            .filter(|value| !value.trim().is_empty())
-            .ok_or_else(|| {
-                WechatProviderError::MissingProfile("微信手机号授权失败：缺少手机号".to_string())
-            })?;
-
-        Ok(WechatPhoneNumberProfile {
-            phone_number,
-            pure_phone_number: phone_info.pure_phone_number,
-            country_code: phone_info.country_code,
-        })
+        normalize_wechat_phone_number_info(phone_info)
     }
 
     async fn request_mini_program_access_token(
@@ -2074,7 +2089,7 @@ mod tests {
                 "errcode": 0,
                 "errmsg": "ok",
                 "phone_info": {
-                    "phoneNumber": "+8613800138000",
+                    "phoneNumber": "13800138000",
                     "purePhoneNumber": "13800138000",
                     "countryCode": "86"
                 }
@@ -2083,9 +2098,55 @@ mod tests {
         .expect("wechat phone number response should parse");
         let phone_info = payload.phone_info.expect("phone info should exist");
 
-        assert_eq!(phone_info.phone_number.as_deref(), Some("+8613800138000"));
-        assert_eq!(phone_info.pure_phone_number.as_deref(), Some("13800138000"));
-        assert_eq!(phone_info.country_code.as_deref(), Some("86"));
+        assert_eq!(phone_info.phone_number, "13800138000");
+        assert_eq!(phone_info.pure_phone_number, "13800138000");
+        assert_eq!(phone_info.country_code, "86");
+        let profile = normalize_wechat_phone_number_info(phone_info)
+            .expect("wechat phone profile should normalize");
+        assert_eq!(profile.phone_number, "13800138000");
+        assert_eq!(profile.pure_phone_number.as_deref(), Some("13800138000"));
+        assert_eq!(profile.country_code.as_deref(), Some("86"));
+    }
+
+    #[test]
+    fn wechat_phone_number_success_response_requires_country_code() {
+        let error = serde_json::from_str::<WechatPhoneNumberResponse>(
+            r#"{
+                "errcode": 0,
+                "phone_info": {
+                    "phoneNumber": "+8613800138000",
+                    "purePhoneNumber": "13800138000"
+                }
+            }"#,
+        )
+        .expect_err("missing provider country code should fail deserialization");
+
+        assert!(error.to_string().contains("countryCode"));
+    }
+
+    #[test]
+    fn wechat_phone_number_error_response_may_omit_phone_info() {
+        let payload = serde_json::from_str::<WechatPhoneNumberResponse>(
+            r#"{
+                "errcode": 40029,
+                "errmsg": "invalid code"
+            }"#,
+        )
+        .expect("wechat error response should remain parseable");
+
+        assert!(payload.phone_info.is_none());
+    }
+
+    #[test]
+    fn wechat_phone_number_profile_requires_non_empty_phone_number() {
+        let error = normalize_wechat_phone_number_info(WechatPhoneNumberInfo {
+            phone_number: " ".to_string(),
+            pure_phone_number: "13800138000".to_string(),
+            country_code: "86".to_string(),
+        })
+        .expect_err("empty provider phone number should fail closed");
+
+        assert!(matches!(error, WechatProviderError::MissingProfile(_)));
     }
 
     #[test]