Abstract: Seal species and leak principle of seal configuration on spacecraft are introduced,especially leak principle of rubber seal configuration.The impacts of space environment such as high vacuum,high and low temperature,space radiation are analyzed.Leak detection technology and several seal performance evaluation systems are developed.Some seal performance tests and studies of these systems have been carried out.Finally,all of seal performance test methods and evaluation systems are summarized.Seal performance research direction of space production in space environment in the future is put forward.