The invention discloses a semi-automatic plastic product excess material cutting table. The semi-automatic plastic product excess material cutting table comprises a processing device and a controlling device; the processing device comprises an electric motor, a gearbox, a triangular chuck and a cutting tool; the electric motor is arranged at the right end of a base; the gear box is arranged at the left part of the electric motor; the triangular chuck is arranged at the left end of an output shaft; the cutting tool is arranged at the left end of the triangular chuck and is fixed through a chuck claw; the controlling device comprises a fixture, a controlling box and a material blocking pin; the controlling box is arranged at the left end of the base; the fixture is arranged on the right part of the controlling box, and the material blocking pin is arranged below the cutting tool. According to the semi-automatic plastic product excess material cutting table, the fixture is controlled by the controlling box to clamp and move a plastic bottle, then the cutting tool rotatably cuts along the inner edge of a bottle opening and the center of the bottle opening serves as a dot, so that reserving for steps with the same width around the bottle opening is guaranteed, not only is processing efficiency improved, but also the sealing effect of the bottle opening is improved.