diff --git a/database/seeders/CropYieldSeeder.php b/database/seeders/CropYieldSeeder.php
index e0c9223..567b430 100644
--- a/database/seeders/CropYieldSeeder.php
+++ b/database/seeders/CropYieldSeeder.php
@@ -18,30 +18,33 @@ class CropYieldSeeder extends Seeder
     public function run()
     {
         $type = 2;
-
         //假数据逻辑：每个地区，每年随机一种农作物，4个季度随机值；
         $bases = AgriculturalBase::where('type', $type)->get();
         foreach ($bases as $base){
-            for ($i = 2019; $i < 2023; $i++) {
-                $crop = Crop::where('is_end', 1)->where('crop_type', $type)->inRandomOrder()->first();
-                for ($j = 1; $j< 5; $j++) {
-                    $insertData[] = [
-                        'base_id' => $base->id,
-                        'crop_id' => $crop->id,
-                        'category_id' => $crop->category_id,
-                        'time_year' => $i,
-                        'quarter' => $j,
-                        'yield' => rand(1000, 9999),
-                        'cultivated'=> rand(100, 999),
-                        'output'=> rand(10000, 99999),
-                    ];
+            $insertData = [];
+            //随机剔除一个农作物不加数据
+            $uncrop = Crop::where('is_end', 1)->where('crop_type', $type)->inRandomOrder()->first();
+            $crops = Crop::where('is_end', 1)->where('crop_type', $type)->where('id', '<>', $uncrop->id)->get();
+            foreach ($crops as $crop){
+                for ($i = 2019; $i < 2023; $i++) {
+                    for ($j = 1; $j< 5; $j++) {
+                        $insertData[] = [
+                            'base_id' => $base->id,
+                            'crop_id' => $crop->id,
+                            'category_id' => $crop->category_id,
+                            'time_year' => $i,
+                            'quarter' => $j,
+                            'yield' => rand(1000, 9999),
+                            'cultivated'=> rand(100, 999),
+                            'output'=> rand(10000, 99999),
+                        ];
+                    }
                 }
             }
-        }
-
-        if(count($insertData) > 1){
-            DB::table('crop_yields')->truncate();
-            CropYield::insert($insertData);
+            if(count($insertData) > 1){
+                // DB::table('crop_yields')->truncate();
+                CropYield::insert($insertData);
+            }
         }
     }
 }