The invention discloses an opening-closing door of processing equipment for a valve cover of an electromagnetic valve. The opening-closing door of the processing equipment for the valve cover of the electromagnetic valve comprises two observation windows arranged on the opening-closing door; upper flanges, lower flanges and side flanges which inwards extend are arranged on the opening-closing door; the opening-closing door further comprises a door locking device; the door locking device comprises a door opening sliding chute formed in one door of the opening-closing door; a spring fixing cover is arranged on the opening-closing door and covers the door opening sliding chute; a first guide seat is arranged on the lower end faces of the upper flanges and are located above the spring fixing cover; the upper end of a first guide post sequentially penetrates through the first guide seat and the upper flanges; the lower end of the first guide post penetrates through the spring fixing cover; and a switch fixing seat is fixedly arranged on the first guide post located in the spring fixing cover. By means of the mode, the opening-closing door disclosed by the invention is simple in structure and simple and convenient to operate; the door can be opened by only sliding a switch; and during locking, the door resets by use of a spring, and can be automatically locked.