The utility model relates to the technical field of electromagnetic valves. The device can quickly judge the on-off state of the electromagnetic valve. Solenoid valve placing platform, wherein the electromagnetic valve placing platform is provided with a pulley baffle plate assembly correspondingly clamped with an electromagnetic valve to be tested and an alligator clip assembly connected with a circuit corresponding to the direct-current power supply, a gas inlet of the electromagnetic valve to be tested is connected with a gas pressure source, a gas outlet of the electromagnetic valve to betested is connected with a pressure sensor, and the pressure sensor is provided with a pressure gauge. According to the utility model, the structural arrangement is adopted; a to-be-tested solenoid valve can be correspondingly clamped through the pulley baffle plate assembly on the solenoid valve placing platform. The crocodile clip assembly on the electromagnetic valve placing platform can externally connect the electromagnetic valve to be tested to a direct-current power supply, gas can be input to the electromagnetic valve to be tested through the gas pressure source, and whether the outputpressure value of the electromagnetic valve to be tested is consistent with the input pressure value or not can be judged through the pressure sensor, so that the on-off state of the electromagneticvalve is judged.