The continuous mixing of fracturing fluid usually uses the load-sensitive hydraulic system in front of the valve as its hydraulic power system.Due to the continuous improvement and refinement of the mixing construction process,multiple motors compound act under high torque conditions,and the flow of the hydraulic system is preferentially distributed to light load when the flow is saturated.In order to solve this problem,the load sensitive hydraulic system behind the valve was selected.In the case of insufficient flow supply,the flow supply of each load was reduced year on year to achieve synchronous motor action.Based on AMESim simulation software,the simulation models of load-sensitive hydraulic system in front of and behind the valve of continuous mixing equipment were built respectively,and the pressure,flow and power change curves of pump and motor were obtained.The simulation results show that the output power of the load sensing pump always matches the power required by the load in the load sensing system behind the valve; when the system flow is sufficient,the pump output flow always changes with the change of the required flow of the system; when the system flow is insufficient,the load sensing valve behind the valve can realize flow sharing,and the load of each motor acts synchronously.The experimental results show that the difference between simulation and experimental data is less than 3%,and the load sensing system can distribute each load flow according to the proportion of the valve opening,so as to realize the steady operation of each load.