The utility model provides a rotation type variable frequency switching valve, which comprises the following components: a valve body, and a valve cor, drive movable valve element pivoted servo motor, the spool chamber has been seted up on the valve body, the perforation has been seted up on the case, the medium hand -hole has been seted up respectively to the both sides of valve body and main medium portals, annular gas storage tank and ring packing groove have been seted up on the pore wall of the spool chamber of valve body, the perforation internal fixation is provided with annular gasbag, the middle part of annular gasbag has the through hole, inlet channel and exhaust passage have been seted up on the case, axial passage's one end is the blind hole, axial passage's the other end is connected with the gas holder, inlet channel and exhaust passage all are linked together with the gas holder, all be provided with one -way electromagnetism pneumatic valve between inlet channel and exhaust passage and the gas holder, medium hand -hole department is provided with the flow measurement meter, the flow measurement meter is connected with two one -way solenoid valve's controller, form the self -lubricating through compressed air, can adjust according to the size of medium flow is automatic in addition.