For the hydraulic system of multiple load sensitive pumps,in order to solve the problem that there is no flow output and the output flow cannot reach the theoretical calculation,through the analysis of the principle of the constant power load sensitive pump,the test was taken by equipment commissioning.AMESim software simulation verification and corresponding practical measures were used to solve the flow,pressure abnormal problems caused by different bias spring force setting and different fixed damping at the pump outlet.Through simulation results with different parameters,the commissioning efficiency was improved.