Cam phaser is vital to increase the efficiency of engine. The maximum corner, friction torque and leakage are important parameters to influence the performance of Variable Cam Phaser(VCP). For the sake of testing these three parameters，the overall structure，the principle of the measurement and work flow are introduced. The industrial control computer, acquisition card and expandable modules are selected to set up electricity control system. Laboratory Virtual Instrumentation Engineering Workbench(LabVIEW) is selected to design upper computer. The test bench can measure VCP，perform conformity judgment，classify VCP after measurement, execute data statistics and create the report form all automatically.