Industrial furnace and working method thereof

The invention provides an industrial furnace and a working method thereof. The advantages of being high in safety and reliability, being capable of achieving locking and sealing of a furnace body anda furnace door, being convenient to operate and being capable of relieving physical labor of operators are achieved. A lock rod is fixed on a furnace door main body; a hook head is arranged at the front end of a pull rod; an opening and closing control guide shaft and a stroke control guide shaft are mounted on the pull rod; a guide seat is fixedly mounted on the furnace body; an opening and closing control guide groove is L-shaped, and a parallel section, an arc transition section and a vertical section are sequentially connected; the opening and closing control guide shaft is installed in the opening and closing control guide groove in a sliding mode and can slide along the opening and closing control guide groove, when the opening and closing control guide shaft slides to the parallel section, the pull rod is i