diff --git a/astrbot/core/zip_updator.py b/astrbot/core/zip_updator.py
index 44335a56af..e70173fa56 100644
--- a/astrbot/core/zip_updator.py
+++ b/astrbot/core/zip_updator.py
@@ -234,6 +234,16 @@ def compare_version(self, v1: str, v2: str) -> int:
         """Semver 版本比较"""
         return VersionComparator.compare_version(v1, v2)
 
+    def _is_prerelease_version(self, version: str) -> bool:
+        """Check if a version string is a prerelease version."""
+        return bool(
+            re.search(
+                r"[\-_.]?(alpha|beta|rc|dev)[\-_.]?\d*$",
+                version,
+                re.IGNORECASE,
+            )
+        )
+
     async def check_update(
         self,
         url: str,
@@ -241,6 +251,7 @@ async def check_update(
         consider_prerelease: bool = True,
     ) -> ReleaseInfo | None:
         update_data = await self.fetch_release_info(url)
+        current_is_prerelease = self._is_prerelease_version(current_version)
 
         sel_release_data = None
         if consider_prerelease:
@@ -249,11 +260,7 @@ async def check_update(
         else:
             for data in update_data:
                 # 跳过带有 alpha、beta 等预发布标签的版本
-                if re.search(
-                    r"[\-_.]?(alpha|beta|rc|dev)[\-_.]?\d*$",
-                    data["tag_name"],
-                    re.IGNORECASE,
-                ):
+                if self._is_prerelease_version(data["tag_name"]):
                     continue
                 tag_name = data["tag_name"]
                 sel_release_data = data
@@ -263,6 +270,10 @@ async def check_update(
             logger.error("未找到合适的发布版本")
             return None
 
+        if current_is_prerelease and not self._is_prerelease_version(tag_name):
+            if self.compare_version(current_version, tag_name) >= 0:
+                return None
+
         if self.compare_version(current_version, tag_name) >= 0:
             return None
         return ReleaseInfo(
diff --git a/tests/test_updator_socks.py b/tests/test_updator_socks.py
index 4cb30430a9..59bc031280 100644
--- a/tests/test_updator_socks.py
+++ b/tests/test_updator_socks.py
@@ -418,6 +418,41 @@ async def fake_download_from_repo_url(
     assert marker_path.read_text(encoding="utf-8") == "VALUE = 'old'\n"
 
 
+@pytest.mark.asyncio
+async def test_check_update_skips_stable_when_current_prerelease_is_newer(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    updator = RepoZipUpdator()
+
+    async def fake_fetch_release_info(url: str, latest: bool = True):  # noqa: ARG001
+        return [
+            {
+                "version": "AstrBot v4.26.0-beta.1",
+                "published_at": "2026-06-20T00:00:00Z",
+                "body": "beta",
+                "tag_name": "v4.26.0-beta.1",
+                "zipball_url": "https://github.example/beta.zip",
+            },
+            {
+                "version": "AstrBot v4.25.6",
+                "published_at": "2026-06-19T00:00:00Z",
+                "body": "stable",
+                "tag_name": "v4.25.6",
+                "zipball_url": "https://github.example/stable.zip",
+            },
+        ]
+
+    monkeypatch.setattr(updator, "fetch_release_info", fake_fetch_release_info)
+
+    result = await updator.check_update(
+        "https://example.invalid/releases",
+        current_version="v4.26.0-dev",
+        consider_prerelease=False,
+    )
+
+    assert result is None
+
+
 @pytest.mark.asyncio
 async def test_astrbot_updator_prefers_hosted_core_package(
     monkeypatch: pytest.MonkeyPatch,