diff --git a/astrbot/core/provider/sources/minimax_tts_api_source.py b/astrbot/core/provider/sources/minimax_tts_api_source.py
index 7ca369708..97d746c55 100644
--- a/astrbot/core/provider/sources/minimax_tts_api_source.py
+++ b/astrbot/core/provider/sources/minimax_tts_api_source.py
@@ -37,12 +37,21 @@ class ProviderMiniMaxTTSAPI(TTSProvider):
             "minimax-is-timber-weight",
             False,
         )
-        self.timber_weight: list[dict[str, str | int]] = json.loads(
-            provider_config.get(
-                "minimax-timber-weight",
-                '[{"voice_id": "Chinese (Mandarin)_Warm_Girl", "weight": 1}]',
-            ),
-        )
+        default_timber_weight = [
+            {"voice_id": "Chinese (Mandarin)_Warm_Girl", "weight": 1}
+        ]
+        raw_timber_weight = provider_config.get("minimax-timber-weight", "")
+        if not raw_timber_weight:
+            self.timber_weight = default_timber_weight
+        else:
+            try:
+                self.timber_weight = json.loads(raw_timber_weight)
+            except json.JSONDecodeError:
+                logger.warning(
+                    "MiniMax TTS 权重配置解析失败，将使用默认值。 raw_value: %s",
+                    raw_timber_weight,
+                )
+                self.timber_weight = default_timber_weight
 
         self.voice_setting: dict = {
             "speed": provider_config.get("minimax-voice-speed", 1.0),