Focusing on electronic positive flow control excavator technology of a large hydraulic excavator,the AMESim model of excavator hydraulic system and the Simulink model of control system were established,especially the improved full power control strategy for dual variable pump was proposed.The complex virtual prototype of electronic positive flow control excavator which could simulate the real situation was established.The output characteristics of the actuator of the excavator system were obtained through co-simulation analysis.The results show that the motion variation of the actuator under external load conforms to the actual motion law; at the same time,the strength and the rationality of the improved full power control strategy proposed is verified by comparing with the divided power control and the full power control.