The embodiment of the invention provides a motor train unit switch type electric pneumatic valve control method. The method comprises the following steps: performing difference value calculation on the received real-time gas pressure acquired by an electric pneumatic valve volume chamber and the preset gas pressure to obtain difference value; comparing the difference value and the preset error value to obtain a comparison result; controlling the first movement of the electric pneumatic valve according to the comparison result and the difference value; calculating the average variable quantityof the real-time gas pressure acquired in the sampling period; and controlling the second movement of the electric pneumatic valve according to the difference value and the average variable quantity.The invention also correspondingly provides a motor train unit switch type electric pneumatic valve control device. The inflating or exhausting process is adjusted by introducing the average gas pressure variable value and hysteresis coefficient, so that adjustment stability is achieved. An electromagnetic valve only moves for one time in a plurality of sampling periods, so that the movement frequency of the electromagnetic valve is greatly reduced, the requirement on the properties of the electromagnetic valve is reduced and the service life of the electromagnetic valve is prolonged.