The dry fast connector is designed for the oil conveyor surface, which consists of two parts (the mother connector and the public connector) both ends of the improvement valve. Through spiral cards, the enhanced valve is completely opened after the connection is in place. It can be passed without being stopped. When disconnecting, it can rotate counterclockwise and separates. At the same time, the valve closure is increased, reducing the leakage in the disconnection and connection link during fluid conveying, thereby achieving environmental protection and saving safety.