Novel slip-type downhole throttler

The invention discloses a novel slip-type downhole throttler. The novel slip-type downhole throttler comprises a release sub, a first shear pin, an upper central tube, a fishing neck, a body, a slip base, a second shear pin, a positioning ring, an inner tube, a slip, a lower central tube, a conical seat, a rubber cylinder, a connector, a first one-way buckle, a connection sleeve, a transition sleeve, an air nozzle, a sand-preventive cover and a spring, wherein the fishing neck penetrates through the body to be in threaded connection with the positioning ring; the inner tube sequentially penetrates through the rubber cylinder, the conical seat, the slip and the slip base; the slip base is in threaded connection with the body and connected with the positioning ring through the second shear pin; the inner tube is nested at one end of the fishing neck; the upper central tube and the lower central tube oppositely penetrate into the inner tube; the release sub is connected with the upper central tube through the fi