Heating protection device applied to manual roll crusher

The utility model discloses a heating protection device applied to a manual roll crusher. The heating protection device applied to the manual roll crusher comprises a housing; a temperature controller and a rubber plug are designed outside the housing; an electric heater and a cavity are designed inside the housing; the electric heater is connected together by wires and is embedded in a cooling fin so as to form an electric heating plate; the cavity contains water; the housing is made of a stainless steel material, and the external surface of the housing is coated with a layer of insulation refractory material; the volume of water contained in the cavity is larger than half of the volume of the cavity and should not exceed three quarters of the volume of the cavity. The heating protection device applied to the manual roll crusher overcomes the shortage of a conventional manual roll crusher, and is a heating device which enables the environment where the roller stays to keep within a certain temperature range,