diff --git a/internal/tools/exporter.go b/internal/tools/exporter.go
index b9657c8..6b410b0 100644
--- a/internal/tools/exporter.go
+++ b/internal/tools/exporter.go
@@ -310,7 +310,7 @@ func (e *Exporter) lookupZTD(ctx context.Context, deviceID string, bucketEnd tim
 		e.logger.Printf("站点 device_id=%s: ZTD值为NULL", deviceID)
 		return ""
 	}
-	return fmtFloat(ztd.Float64*1000.0, -1)
+	return fmtFloat(ztd.Float64*100.0, -1)
 }
 
 func ensureFileWithHeader(path string) bool {