diff --git a/src/main/java/com/atsuishio/superbwarfare/item/DPSGeneratorDeployer.java b/src/main/java/com/atsuishio/superbwarfare/item/DPSGeneratorDeployer.java
index 632f3ad69..642ac1b73 100644
--- a/src/main/java/com/atsuishio/superbwarfare/item/DPSGeneratorDeployer.java
+++ b/src/main/java/com/atsuishio/superbwarfare/item/DPSGeneratorDeployer.java
@@ -11,6 +11,7 @@ import net.minecraft.stats.Stats;
 import net.minecraft.world.InteractionHand;
 import net.minecraft.world.InteractionResult;
 import net.minecraft.world.InteractionResultHolder;
+import net.minecraft.world.entity.Entity;
 import net.minecraft.world.entity.MobSpawnType;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.item.Item;
@@ -29,6 +30,7 @@ import org.jetbrains.annotations.NotNull;
 import javax.annotation.ParametersAreNonnullByDefault;
 import java.util.List;
 import java.util.Objects;
+import java.util.function.Predicate;
 
 public class DPSGeneratorDeployer extends Item {
 
@@ -42,6 +44,8 @@ public class DPSGeneratorDeployer extends Item {
         tooltipComponents.add(Component.translatable("des.superbwarfare.dps_generator_deployer").withStyle(ChatFormatting.GRAY).withStyle(ChatFormatting.ITALIC));
     }
 
+    private static final Predicate<Entity> IS_GENERATOR = e -> e instanceof DPSGeneratorEntity;
+
     @Override
     public @NotNull InteractionResult useOn(UseOnContext pContext) {
         Level level = pContext.getLevel();
@@ -59,6 +63,15 @@ public class DPSGeneratorDeployer extends Item {
                 pos = blockpos.relative(direction);
             }
 
+            // 禁止堆叠
+            if (!level.getEntities(
+                    (Entity) null,
+                    ModEntities.DPS_GENERATOR.get().getSpawnAABB(pos.getX() + 0.5, pos.getY() + 0.5, pos.getZ() + 0.5),
+                    IS_GENERATOR
+            ).isEmpty()) {
+                return InteractionResult.FAIL;
+            }
+
             if (ModEntities.DPS_GENERATOR.get().spawn((ServerLevel) level, itemstack, pContext.getPlayer(), pos, MobSpawnType.SPAWN_EGG, true, !Objects.equals(blockpos, pos) && direction == Direction.UP) != null) {
                 itemstack.shrink(1);
                 level.gameEvent(pContext.getPlayer(), GameEvent.ENTITY_PLACE, blockpos);
@@ -69,28 +82,37 @@ public class DPSGeneratorDeployer extends Item {
     }
 
     @Override
-    public @NotNull InteractionResultHolder<ItemStack> use(@NotNull Level pLevel, Player pPlayer, @NotNull InteractionHand pHand) {
-        ItemStack itemstack = pPlayer.getItemInHand(pHand);
-        BlockHitResult blockhitresult = getPlayerPOVHitResult(pLevel, pPlayer, ClipContext.Fluid.SOURCE_ONLY);
+    public @NotNull InteractionResultHolder<ItemStack> use(@NotNull Level level, Player player, @NotNull InteractionHand hand) {
+        ItemStack itemstack = player.getItemInHand(hand);
+        BlockHitResult blockhitresult = getPlayerPOVHitResult(level, player, ClipContext.Fluid.SOURCE_ONLY);
         if (blockhitresult.getType() != HitResult.Type.BLOCK) {
             return InteractionResultHolder.pass(itemstack);
-        } else if (!(pLevel instanceof ServerLevel)) {
+        } else if (!(level instanceof ServerLevel)) {
             return InteractionResultHolder.success(itemstack);
         } else {
             BlockPos blockpos = blockhitresult.getBlockPos();
-            if (!(pLevel.getBlockState(blockpos).getBlock() instanceof LiquidBlock)) {
+            if (!(level.getBlockState(blockpos).getBlock() instanceof LiquidBlock)) {
                 return InteractionResultHolder.pass(itemstack);
-            } else if (pLevel.mayInteract(pPlayer, blockpos) && pPlayer.mayUseItemAt(blockpos, blockhitresult.getDirection(), itemstack)) {
-                DPSGeneratorEntity entity = ModEntities.DPS_GENERATOR.get().spawn((ServerLevel) pLevel, itemstack, pPlayer, blockpos, MobSpawnType.SPAWN_EGG, false, false);
+            } else if (level.mayInteract(player, blockpos) && player.mayUseItemAt(blockpos, blockhitresult.getDirection(), itemstack)) {
+                // 禁止堆叠
+                if (!level.getEntities(
+                        (Entity) null,
+                        ModEntities.DPS_GENERATOR.get().getSpawnAABB(blockpos.getX() + 0.5, blockpos.getY() + 0.5, blockpos.getZ() + 0.5),
+                        IS_GENERATOR
+                ).isEmpty()) {
+                    return InteractionResultHolder.fail(itemstack);
+                }
+
+                DPSGeneratorEntity entity = ModEntities.DPS_GENERATOR.get().spawn((ServerLevel) level, itemstack, player, blockpos, MobSpawnType.SPAWN_EGG, false, false);
                 if (entity == null) {
                     return InteractionResultHolder.pass(itemstack);
                 } else {
-                    if (!pPlayer.getAbilities().instabuild) {
+                    if (!player.getAbilities().instabuild) {
                         itemstack.shrink(1);
                     }
 
-                    pPlayer.awardStat(Stats.ITEM_USED.get(this));
-                    pLevel.gameEvent(pPlayer, GameEvent.ENTITY_PLACE, entity.position());
+                    player.awardStat(Stats.ITEM_USED.get(this));
+                    level.gameEvent(player, GameEvent.ENTITY_PLACE, entity.position());
                     return InteractionResultHolder.consume(itemstack);
                 }
             } else {