The invention relates to the technical field of processing of solenoid valves, in particular to a drying treatment method for a valve pocket of a solenoid valve. The method comprises the steps that the surface of the valve pocket of the solenoid valve is scrubbed with degreasing cotton with ethyl acetate attached and then wiped dry with dry cloth; the valve pocket of the solenoid valve is put into treating fluid to be soaked for 5 minutes; the valve pocket of the solenoid valve is put into a heating furnace and dried through heat generated by a quartz tube heating component at the temperature of 100-350 DEG C; and the temperature is decreased to the room temperature at the rate of 20 DEG C per hour. According to the drying treatment method, the step of soaking in the treating fluid is added, and the formula of the treating fluid and a preparation method of the treating fluid are reasonably designed, so that an effective layer of protective film is formed on the surface of the valve pocket of the solenoid valve. Meanwhile, the quartz tube heating component is used for heating to achieve high convection of heat, and heating is sufficient and uniform.