The invention discloses a tumor resecting device. The tumor resecting device comprises a pipe body, wherein a tank body of which one end is provided with an opening is arranged in the pipe body in a sleeving manner; the opening end of the tank body is downward; a height adjusting device is fixed to the bottom surface of an inner cavity of the tank body; a pressing assembly is arranged at one end depart from the bottom surface of the inner cavity of the tank body, of the height adjusting device, and is used for exerting opening and closing acting force to a clamping jaw assembly below the pressing assembly to release or clamp a tumor; a guiding device convenient for the tank body to move to change the position of the clamping jaw assembly is arranged between the pipe body and the tank body;a limiting structure for fixing the clamping jaw assembly to conveniently remove the tumor is arranged on the guiding device; and a cutting device for removing the tumor is arranged at one end closeto the clamping jaw assembly, of the pipe body. According to the tumor resecting device disclosed by the invention, the tumor is clamped by the clamping jaw assembly, and then is lifted to the heightconvenient for manual tying; the blood supply of the tumor part is cut off in the tying manner, and separating work is performed above the tying location by the cutting device, so that the purpose ofremoving the tumor is achieved; the operation is simple and convenient; and the wounded surface is small, and the recovering speed is high.