diff --git a/v2/delivery/position_service.go b/v2/delivery/position_service.go
index 0a7faa3b..8a5c89e1 100644
--- a/v2/delivery/position_service.go
+++ b/v2/delivery/position_service.go
@@ -119,7 +119,7 @@ func (s *UpdatePositionMarginService) Amount(amount string) *UpdatePositionMargi
 	return s
 }
 
-// Type set action type: 1: Add postion margin，2: Reduce postion margin
+// Type set action type: 1: Add position margin，2: Reduce position margin
 func (s *UpdatePositionMarginService) Type(actionType int) *UpdatePositionMarginService {
 	s.actionType = actionType
 	return s
diff --git a/v2/futures/order_service.go b/v2/futures/order_service.go
index 89a6ff2e..5a484f85 100644
--- a/v2/futures/order_service.go
+++ b/v2/futures/order_service.go
@@ -226,7 +226,7 @@ type CreateOrderResponse struct {
 	ClosePosition           bool             `json:"closePosition"`               // if Close-All
 	PriceProtect            bool             `json:"priceProtect"`                // if conditional order trigger is protected
 	PriceMatch              string           `json:"priceMatch"`                  // price match mode
-	SelfTradePreventionMode string           `json:"selfTradePreventionMode"`     // self trading preventation mode
+	SelfTradePreventionMode string           `json:"selfTradePreventionMode"`     // self trading presentation mode
 	GoodTillDate            int64            `json:"goodTillDate"`                // order pre-set auto cancel time for TIF GTD order
 	CumQty                  string           `json:"cumQty"`                      //
 	OrigType                OrderType        `json:"origType"`                    //
diff --git a/v2/futures/position_service.go b/v2/futures/position_service.go
index 37c5bf55..a9708e1b 100644
--- a/v2/futures/position_service.go
+++ b/v2/futures/position_service.go
@@ -119,7 +119,7 @@ func (s *UpdatePositionMarginService) Amount(amount string) *UpdatePositionMargi
 	return s
 }
 
-// Type set action type: 1: Add postion margin，2: Reduce postion margin
+// Type set action type: 1: Add position margin，2: Reduce position margin
 func (s *UpdatePositionMarginService) Type(actionType int) *UpdatePositionMarginService {
 	s.actionType = actionType
 	return s