Proportional overflow electromagnetic valve of sliding valve structure and work method of valve

The invention discloses a proportional overflow electromagnetic valve of a sliding valve structure and a work method of the valve. According to the proportional overflow electromagnetic valve of the sliding valve structure, the head of a valve element extends into a blind hole of a plug at a valve sleeve, a feedback cavity is formed between the end face of the head of the valve element and the blind hole of the plug, the stress sectional area of hydraulic feedback force is the cross sectional area of the head of the valve element, the maximum controlled hydraulic pressure is decided by the diameter of the head of the valve element, and is not related to the diameter of the whole valve element, and the confliction condition is avoided; a structure easily affecting the reliability and performance is avoided. 种滑阀结构的比例溢流电磁阀及其工作方法，滑阀结构的比例溢流电磁阀，其阀芯头部伸进阀套处堵头的盲孔中，阀芯头部端面与堵头的盲孔之间形成反馈腔，液压反馈力的受力面积为阀芯头部的截面积，最大被控液压的大小由阀芯头部直径决定，而与整个阀芯的直径无关，不会发生两者相冲突的情况。也没有容易影响可靠性或影响性能的结构。