In order to improve the test efficiency and reliability of the connector, this paper puts forward a kind of automatic test system design scheme which is used for the test of turnon、insulation and resisting voltage for connector, and introduces the technical index of the system, working principle, hardware composition and software realization. The system is established with supervision PC and slave computers. In supervision PC , software of data management and analysis is designed with Visual Studio 2013 and SQL server2012, the slave computer imposes the testing voltage and collects data with the single channel programcontrolled instrument for insulation and resisting voltage and the universal meter, and chooses test channels with the channel switch module based on CAN bus . The system has the advantages of fast test, accurate result, high reliability and easy operation.