Abstract: The space environment simulator is used to simulate the vacuum, the cold and black and the solar irradiation. GVU-600 is the first aerospace facility developed by China for Russia. It is mainly used for the thermal vacuum test and the thermal balance test. GVU-600 is horizontal and cylindrical with a dimension of 8 m(inner diameter)×13.5 m(total length), an ultimate pressure of 1.4×10-5 Pa, and an average temperature of -190 ℃ in the thermal shroud. This paper discusses the facility’s specifications, configuration, and functions, with test results.