Electromagnetic valve with anti-contamination structure

The utility model discloses an electromagnetic valve with an anti-contamination structure. The electromagnetic valve comprises an electromagnetism part, a valve element and a valve sleeve, a slender contamination drain hole is formed in the valve sleeve, located between a pressure supply opening of the valve sleeve and the electromagnetism part and connected with a pressure relief opening, and a gap between the valve sleeve and the valve element and the pressure relief opening are communicated through the contamination drain hole. As the contamination drain hole is additionally formed between the pressure supply opening of the valve sleeve and the electromagnetism part and connected with the pressure relief opening of the electromagnetic valve, under the hydraulic action, when contaminant particles entering the gap between the valve sleeve and the valve element move to a low-pressure cavity (the electromagnetism part) from a high-pressure cavity (the pressure supply opening), the contaminant particles will preferentially flow out of a valve body through the contamination drain hole due to the pressure difference action, in the whole life cycle, the deposition quantity of the contaminant particles of the electromagnetism part of the electromagnetic valve is greatly reduced, and the probability that the contaminant particles directly enter the low-pressure cavity of the electromagnetism part is effectively reduced; the electromagnetic valve is easy to obtain, and extra cost is not increased basically.