Handheld instrument for laparoscopic operation

The invention discloses a handheld instrument for laparoscopic operation, and relates to the field of thoracic and abdominal cavity minimally invasive surgical medical equipment. The instrument includes an execution part and an adjustment part; the execution part includes clamping jaws connected with a pull rod through a No.1 slide block and a No.2 slide block, a clamp seat is connected with a rotatable screw sleeve, the screw sleeve is in screw connection with a deflection joint, the deflection joint is in clamp connection with a long tube through a guide groove, the long tube is connected with the adjustment part, and the adjustment part includes a handle mechanism; the pull rod passes through the clamp seat, the screw sleeve, the deflection joint and the long tube to be clamped into a handle groove of the handle mechanism; the front end of the handle mechanism is arranged in a shift wheel in a pass-through manner, and the shift wheel and a rotating sleeve are respectively axially fixed to two ends of a gui