Aiming at the problems remaining in the gasoline direct injection (GDI) engines such as high pressure fuel pump noise and low dynamic response in high pressure fuel rail, the driving current in the pump spill valve is optimized and a control strategy of pump fuel quantity is designed to reduce the work noise of high pressure oil pump and also to shorten the dynamic response time in high pressure fuel rail. When the throttle opening increases from 20% to 50% and target fuel rail pressure from 6.5 MPa to 9.3 MPa, the dynamic response time is only 4 s. Therefore, it is concluded that the method is feasible, and it provides the reference value for optimization of engine fuel injection control system.