In order to solve the problem of unequal flow between two cavity of pump controlled asymmetric cylinder, on the basis of the axial symmetry plunger pump, a way is put forward to balance the asymmetric cylinder asymmetric flow of variable pump controlled cylinder as closed solution. By controlling the asymmetric variable pump swash plate angle to the direction of asymmetric cylinder and two cavity flow control, which was applied to load sensing hydraulic excavator boom circuit. In order to analyze the feasibility of this scheme, AMESim software was used to build the system simulation model. Through simulation analysis, the operating characteristics and energy consumption characteristics of the boom for the variable asymmetric pump controlled system and the traditional load sensing valve controlled system were compared. The results show that the operating boom of variable asymmetric pump controlled system is more stable and the energy consumption decreased by 36.9%.