Vacuum heating furnace

The utility model discloses a vacuum heating furnace which comprises a furnace body and a lifting assembly. A cavity is formed in the side wall of the furnace body, an induction coil is arranged in the cavity, the input end of the induction coil is electrically connected with the output end of a control switch set arranged on the outer arc face of the furnace body, the input end of the control switch set is electrically connected with an external power source, a sealing cover is buckled to the upper end of the furnace body, and supporting feet are arranged on the lower surface of the furnace body in an annular array mode. The lifting assembly is arranged in the furnace body and comprises a carrying plate, convex columns, a guide groove, a rotating shaft and a convex strip, the guide groove is formed in the inner wall of the furnace body and is in a wave shape, the convex columns are symmetrically arranged at the front end and the rear end of the outer arc face of the carrying plate, and the convex columns and