Abstract: In this paper, test method of the Thermal Vacuum Test (TVT) for separate module of CBERS-02 is described. The difference between the separate module test and the whole satellite test are analyzed, and the key and nodus of the test are also referred. Test results show that the first separate module TVT is successful, and the expect purpose is achieved. At the end of this paper, the basic requirements to do a separate module TVT are discussed.