In order to meet the test requirements of the four-quadrant hydraulic pump and improve the research and development and test efficiency of the four-quadrant hydraulic pump,a comprehensive performance test bench was designed.The test bed was composed of two parts such as oil filling circuit and test circuit,frequency converter and PLC were used as the lower computer for data acquisition and control,and the industrial control computer was used as the upper computer for man-machine interaction to realize speed adjustment and monitoring of each switch.Real-time acquisition and display of field data were realized by the Ethernet communication between industrial control computer and PLC,and saving data,drawing performance curve and outputting report form could be realized.The test bench system is easy to operate and has high test precision,and it has been used to support the research and development of four-quadrant pump.