Four-way valve pilot reverser

The utility model relates to the technical field of four-way valves, in particular to a pilot reverser of a four-way valve, which comprises a tail shell and a middle outer shell which are matched and butted, one end of the middle outer shell is provided with a cover body for sealing, the outer side of the middle outer shell is sleeved with an electromagnetic coil, and a magnetic field is formed by controlling the electromagnetic coil to be electrified. A spring is arranged at one end in the tail shell, an air inlet and outlet structure is arranged on the outer side face of the spring, one end of the spring is in butt joint with a sliding piece, a pushing piece is arranged at the front end of one side of the sliding piece, and a plurality of protruding strips are connected to the outer side of the pushing piece. The electromagnetic valve is more energy-saving and low in failure rate, can be closed for the second time when 220V is electrified for 0.01 second, and can be kept in a closed state when a power suppl