Novel oil production wellhead load conversion device

The invention discloses a novel oil production wellhead load conversion device. The novel oil production wellhead load conversion device is placed at an oil production wellhead in actual use, third notches in a first half clamp and a second half clamp abut against a polish rod of an oil pumping unit, and the polish rod of the oil pumping unit is located at a first notch and a second notch; then screw rods are screwed in a first threaded hole and a second threaded hole, the third notches in the first half clamp and the second half clamp make close contact with the polish rod of the pumping unitin the mode that nuts at the two ends of the screw rods are operated, the polish rod of the pumping unit is fixed, and then two hydraulic oil cylinders on an upper-layer base and a lower-layer base are started, so that piston rods in the hydraulic oil cylinders extend to drive a jacking plate to ascend; and then the first half clamp and the second half clamp are pushed to ascend to drive the polish rod of the pumping uni