Based on VC++ software development platform, the performance test system of motorcycle hydraulic disc brake pump was designed. This test system can be used to test brake cylinder's low pressure tightness and piston stroke. The system structure layout，test principle and software design were introduced. A brake pump sample was tested by this test system. The results show that this test system can completely achieve presetting standard, and no data bounce and data distortion appears during the test, it can be used for new product development, product inspection and production process improvement.