The invention relates to a thermocoagulation scalpel device, which is mainly composed of a host machine and a scalpel assembly; the scalpel assembly is a scalpel blade and a scalpel handle, and the scalpel blade is in the shape of a sheet, and a blade is provided on one side of the front end, and the periphery of the blade is connected There is a cutter body at the center, the cutter body is in the shape of multi-layer sheets, the base layer of the cutter body is an insulating base layer, and the cutter body is respectively a heating element, an insulating encapsulation layer and a Teflon coating from the inside to the outside. An electrode is provided on the head, and the electrode is inserted into the front end of the scalpel handle, and is in a fixed connection state as a whole. An external heater and an external temperature sensor are attached to the outside of the surgical blade, and the external heater is a heating circuit; the heating The body is a loop-shaped circuit heating belt. The blade surface adopts an external heating type. The external heating circuit is outside the surface of the surgical blade, and is controlled by a computer system to form a precise control system, so that it is "heated" and not "charged", ensuring that the scalpel Safe to use.