diff --git a/server/gameserver/mtb/BattleBasicAttribute.h b/server/gameserver/mtb/BattleBasicAttribute.h
index d0c02c72..32504df9 100644
--- a/server/gameserver/mtb/BattleBasicAttribute.h
+++ b/server/gameserver/mtb/BattleBasicAttribute.h
@@ -40,6 +40,7 @@ namespace mtb
     float vOrigHaste() const { return vOrigHaste_; };
     float vOrigDrain() const { return vOrigDrain_; };
     float vOrigTenacity() const { return vOrigTenacity_; };
+    float vOrigBloDef() const { return vOrigBloDef_; };
 
     bool has_id() const { return __flags__.test(0);};
     bool has_pBaseHealth() const { return __flags__.test(1);};
@@ -71,6 +72,7 @@ namespace mtb
     bool has_vOrigHaste() const { return __flags__.test(27);};
     bool has_vOrigDrain() const { return __flags__.test(28);};
     bool has_vOrigTenacity() const { return __flags__.test(29);};
+    bool has_vOrigBloDef() const { return __flags__.test(30);};
 
   protected:
 
@@ -104,9 +106,10 @@ namespace mtb
     float vOrigHaste_ = 0.0f;
     float vOrigDrain_ = 0.0f;
     float vOrigTenacity_ = 0.0f;
+    float vOrigBloDef_ = 0.0f;
 
 public:
-    std::bitset<30> __flags__;
+    std::bitset<31> __flags__;
   };
 
 };
diff --git a/server/gameserver/mtb/mtb.all.cc b/server/gameserver/mtb/mtb.all.cc
index 79f8a4d7..a949bf9b 100644
--- a/server/gameserver/mtb/mtb.all.cc
+++ b/server/gameserver/mtb/mtb.all.cc
@@ -901,7 +901,7 @@ namespace mtb
     {
       std::shared_ptr<a8::reflect::Class> meta_class = nullptr;
       if (!meta_class) {
-        meta_class = std::make_shared<a8::reflect::Class>("BattleBasicAttribute", 30, 0);
+        meta_class = std::make_shared<a8::reflect::Class>("BattleBasicAttribute", 31, 0);
         meta_class->SetSimpleField(0, "id", a8::reflect::ET_INT32, my_offsetof2(BattleBasicAttribute, id_));
         meta_class->SetSimpleField(1, "pBaseHealth", a8::reflect::ET_FLOAT, my_offsetof2(BattleBasicAttribute, pBaseHealth_));
         meta_class->SetSimpleField(2, "pOrigHealth", a8::reflect::ET_FLOAT, my_offsetof2(BattleBasicAttribute, pOrigHealth_));
@@ -932,6 +932,7 @@ namespace mtb
         meta_class->SetSimpleField(27, "vOrigHaste", a8::reflect::ET_FLOAT, my_offsetof2(BattleBasicAttribute, vOrigHaste_));
         meta_class->SetSimpleField(28, "vOrigDrain", a8::reflect::ET_FLOAT, my_offsetof2(BattleBasicAttribute, vOrigDrain_));
         meta_class->SetSimpleField(29, "vOrigTenacity", a8::reflect::ET_FLOAT, my_offsetof2(BattleBasicAttribute, vOrigTenacity_));
+        meta_class->SetSimpleField(30, "vOrigBloDef", a8::reflect::ET_FLOAT, my_offsetof2(BattleBasicAttribute, vOrigBloDef_));
       }
       return meta_class;
     }
diff --git a/server/gameserver/netdata.cc b/server/gameserver/netdata.cc
index 1439db74..21ce6a0d 100644
--- a/server/gameserver/netdata.cc
+++ b/server/gameserver/netdata.cc
@@ -745,7 +745,8 @@ static float ProEffect(float p, float b)
         float x = std::floor(p) *b;
         float y = std::max(x + b, -1.0f);
         float q = (p * b - y) / (x - y);
-        return 0;
+        float rnd = (float)rand() / (float)RAND_MAX;
+        return rnd < q ? x : y;
     } else {
         return 0.0f;
     }
@@ -755,17 +756,24 @@ float BattleDataContext::CalcDmg(Creature* target, IBullet* bullet)
 {
     g_calc_dmg_context = {0};
     g_calc_dmg_context.is_crit = 0;
+
+    float vEbc = 1.0f;
+    float vEd = 1 - target->GetNetData()->GetDef();
     float X = (1 + hero_ability_->GetCrit()) * (1 - target->GetNetData()->GetBlock()) - 1;
     if (X > 0.00001f) {
-        float vCritBon = 0.0f;
-        float E = ProEffect(X, vCritBon);
+        //触发暴击
+        float vCritBon = hero_ability_->hero_meta->GetBasicMeta()->vOrigCriBon();
+        float E = ProEffect(X, vCritBon); //E >= 0
         if (E > 0.00001f) {
-
-        } else {
-
+            vEbc = 1 + E;
         }
     } else {
-
+        //触发格挡 0,-1
+        float vBlock = hero_ability_->hero_meta->GetBasicMeta()->vOrigBloDef();
+        float E = ProEffect(X, -vBlock); //E >= 0
+        if (E < 0.00001f) {
+            vEbc = 1 + E;
+        }
     }
     float vAttack = GetHeroTotalAtk();
     float vBullet = GetWeaponAtk(bullet);
@@ -774,8 +782,6 @@ float BattleDataContext::CalcDmg(Creature* target, IBullet* bullet)
     float vNormalDamageTakenRateIn = 0.0f;
     float vDmg = vAttack * vBullet / BDM * (1 + vNormalDamageDealtRateIn) * ( 1 + vNormalDamageTakenRateIn);
 
-    float vEbc = 1.0f;
-    float vEd = 1 - target->GetNetData()->GetDef();
     float DDR = 0.0f;
     float DTR = 0.0f;
     float finaly_dmg = vDmg * vEbc * vEd * (1 + DDR) * (1 + DTR);
diff --git a/server/tools/protobuild/mt.proto b/server/tools/protobuild/mt.proto
index 2887ac00..838ed444 100755
--- a/server/tools/protobuild/mt.proto
+++ b/server/tools/protobuild/mt.proto
@@ -697,6 +697,7 @@ message BattleBasicAttribute
     optional float vOrigHaste = 28;
     optional float vOrigDrain = 29;
     optional float vOrigTenacity = 30;
+    optional float vOrigBloDef = 31;
 }
 
 message BattleLevelAttribute