Abstract:Pressureflow test experiments for vane pump and axial piston pump on the hydraulic experiment platform were made. The equations for flow rate, volumetric efficiency and overall efficiency of hydraulic pump were built. The flow rate data of the throttle valve when hydraulic pump in different outlet pressure were collected, the pressureflow characteristic curves were drawn by using MATLAB software, and contrastive analysis to pressureflow characteristic of two kinds of pump was made.