Air pressure accessory comprehensive performance test bench and test method thereof

The invention provides an air pressure accessory comprehensive performance test bench and a test method thereof. The test bench comprises a normal temperature test bench, a high and low temperature test vehicle capable of being placed in high and low temperature environments, a first test branch used for carrying out a micro-pressure switch test, a second test branch used for carrying out a medium voltage withstand test, an alternate pressure passing test and a pressure reduction rate test, and a third test branch used for carrying out a high voltage withstand test. One ends of the first test branch, the second test branch and the third test branch are arranged on the normal temperature test bench, the other ends of the first test branch, the second test branch and the third test branch are arranged on the high and low temperature test vehicle, the first test branch, the second test branch and the third test branch are simultaneously communicated with a fifth pipeline at one end of the normal temperature test