The invention relates to a universal test board for aircraft pneumatic accessories. The test board comprises a test board body, wherein an operation table and an operation panel are arranged on the outside of the test board body, a cold gas system and an electrical system are arranged in the test board body, and the electrical system is connected with the cold gas system and supplies power to the cold gas system; the cold gas system comprises a first test unit, a second test unit and a flow test unit, the first test unit is used for testing ordinary type pneumatic accessories, the second test unit is used for testing special pneumatic accessories, and the flow test unit is used for testing aircraft fuel ventilation and pressurization system pneumatic accessories. The test board can perform performance test to the pressure and the flow of the cold gas system, environment control system and aircraft fuel ventilation and pressurization system pneumatic accessories, and basic requirements for performance test of the cold gas system, environment control system and fuel ventilation and pressurization system pneumatic accessories on the aircraft before aircraft installation and during periodic work are met.