diff --git a/app/admin/scheme/MallGoods.php b/app/admin/scheme/MallGoods.php
index b21ab9a..8fdf352 100644
--- a/app/admin/scheme/MallGoods.php
+++ b/app/admin/scheme/MallGoods.php
@@ -40,10 +40,10 @@ class MallGoods extends BaseScheme
     #[Field(type: 'text', comment: '商品属性')]
     public $property;
 
-    #[Field(type: 'decimal', length: 8, precision: 8, scale: 2, default: '0.00', comment: '市场价')]
+    #[Field(type: 'decimal', length: 8, precision: 8, default: '0', comment: '市场价')]
     public $market_price;
 
-    #[Field(type: 'decimal', length: 8, precision: 8, scale: 2, default: '0.00', comment: '折扣价')]
+    #[Field(type: 'decimal', length: 8, precision: 8, default: '0', comment: '折扣价')]
     public $discount_price;
 
     #[Field(type: 'int', length: 11, default: '0', comment: '销量', unsigned: true)]
diff --git a/extend/base/common/command/scheme/Sync.php b/extend/base/common/command/scheme/Sync.php
index bb91533..ea544ac 100644
--- a/extend/base/common/command/scheme/Sync.php
+++ b/extend/base/common/command/scheme/Sync.php
@@ -7,7 +7,9 @@ use think\console\Input;
 use think\console\input\Option;
 use think\console\Output;
 use think\facade\Config;
+use think\facade\Db;
 use app\common\service\scheme\SchemeToDbService;
+use app\common\service\scheme\DbToSchemeService;
 use app\common\scheme\attribute\Table;
 use ReflectionClass;
 
@@ -26,10 +28,12 @@ class Sync extends Command
         $skipData = $input->getOption('skip-data');
 
         $service = new SchemeToDbService();
+        $generator = new DbToSchemeService();
         $schemeDir = app()->getAppPath() . 'admin/scheme/';
         $ignoreTables = Config::get('scheme.ignore_tables', []);
         $connection = Config::get('database.default', 'mysql');
         $prefix = Config::get('database.connections.' . $connection . '.prefix', '');
+        $backupPrefix = Config::get('scheme.backup_prefix', 'backup');
         
         if (!is_dir($schemeDir)) {
             $output->writeln("<error>Scheme directory not found: $schemeDir</error>");
@@ -43,11 +47,37 @@ class Sync extends Command
             
             if (class_exists($className)) {
                 $tableName = $this->getTableNameFromScheme($className);
-                if (!empty($tableName) && $this->isIgnoredTable($tableName, $ignoreTables, $prefix)) {
-                    $output->writeln("Skipping $className (ignored table: $tableName)");
+                if (empty($tableName)) {
+                    $output->writeln("Skipping $className (missing table name)");
                     continue;
                 }
 
+                $fullTableName = $this->getFullTableName($tableName, $prefix);
+                if ($this->isBackupTable($fullTableName, $prefix, $backupPrefix)) {
+                    $output->writeln("Skipping $className (backup table: $fullTableName)");
+                    continue;
+                }
+
+                if ($this->isIgnoredTable($fullTableName, $ignoreTables, $prefix)) {
+                    $output->writeln("Skipping $className (ignored table: $fullTableName)");
+                    continue;
+                }
+
+                if ($this->checkTableExists($connection, $fullTableName)) {
+                    try {
+                        $expectedClass = basename($file, '.php');
+                        $generated = $generator->generate($fullTableName, $expectedClass);
+                        $existing = (string)file_get_contents($file);
+                        if ($this->normalizeCode($generated) === $this->normalizeCode($existing)) {
+                            $output->writeln("Skipping $className (no schema changes)");
+                            continue;
+                        }
+                    } catch (\Exception $e) {
+                        $output->writeln("<error>Check failed for $className: " . $e->getMessage() . "</error>");
+                        continue;
+                    }
+                }
+
                 $output->writeln("Syncing $className...");
                 try {
                     $backup = $service->sync($className, $skipData);
@@ -91,4 +121,47 @@ class Sync extends Command
 
         return in_array($shortName, $ignoreTables, true) || in_array($tableName, $ignoreTables, true);
     }
+
+    protected function normalizeCode(string $code): string
+    {
+        $code = str_replace(["\r\n", "\r"], "\n", $code);
+        $code = preg_replace('/[ \t]+$/m', '', $code);
+        return trim((string)$code);
+    }
+
+    protected function checkTableExists(string $connection, string $tableName): bool
+    {
+        $database = (string)Config::get('database.connections.' . $connection . '.database', '');
+        if ($database !== '') {
+            $rows = Db::connect($connection)->query(
+                'SELECT 1 FROM information_schema.TABLES WHERE TABLE_SCHEMA = ? AND TABLE_NAME = ? LIMIT 1',
+                [$database, $tableName]
+            );
+            return !empty($rows);
+        }
+
+        $escaped = addcslashes($tableName, "\\_%");
+        $tables = Db::connect($connection)->query("SHOW TABLES LIKE '$escaped'");
+        return !empty($tables);
+    }
+
+    protected function getFullTableName(string $tableName, string $prefix): string
+    {
+        if ($prefix && !str_starts_with($tableName, $prefix)) {
+            return $prefix . $tableName;
+        }
+
+        return $tableName;
+    }
+
+    protected function isBackupTable(string $tableName, string $prefix, string $backupPrefix): bool
+    {
+        $basePrefix = $prefix . $backupPrefix;
+        if ($basePrefix === '') {
+            return false;
+        }
+
+        $pattern = '/^' . preg_quote($basePrefix, '/') . '_?\\d{14}(?:_.*)?$/';
+        return preg_match($pattern, $tableName) === 1;
+    }
 }