The invention discloses a baking box body. The baking box body comprises a box body, wherein an inner box body is arranged in the box body; a plurality of connecting plates are fixed on the outer side wall of the inner box body; the other ends of the connecting plates are fixed on the inner side wall of the box body; heating bars are respectively arranged on the upper part and the lower part of the inside of the inner box body; the left ends of the heating bars are fixed on the left side wall of the inner box body; the right ends of the heating bars extend into screw through holes formed in the right side wall of the inner box body; guiding sleeves are in screwed connection to the insides of the screw through holes; the right ends of the heating bars are inserted in the guiding sleeves; the outer side walls of the right ends of the heating bars are closely attached to the inner side walls of the guiding sleeves; a through groove is formed in the inner wall of the right side of the box body; the right end of a threading sleeve is inserted in the through groove; the outer side wall of the right end of the threading sleeve is fixed on the inner side wall of the through groove; the left end of the threading sleeve is fixed on the outer wall of the right side of the inner box body; and the threading sleeve communicates with the guiding sleeve. A central pin can rotate, so that a food material rotates; the uniformity of barbecue is improved; and the barbecue effect is also improved.