The utility model relates to garbage disposal mechanical equipment, and aims to provide a box body structure of a double-shaft shearing type garbage crusher, which can change the distance between shafts. Wherein the four side walls are installed on a box body base, and the shaft seat wall on each side is composed of a fixed shaft seat wall and a movable shaft seat wall which are adjacently arranged side by side; the two fixed shaft seat walls and the two movable shaft seat walls are respectively and oppositely arranged into a group and are respectively used for mounting and supporting a crushing shaft; and the movable shaft seat wall is mounted on the box body base through a movable connecting part at the bottom of the movable shaft seat wall and can move in the direction perpendicular tothe crushing shaft. According to the utility model, each wall surface is formed by assembling a plurality of wall surfaces, so that the processing and the manufacturing are convenient; size adjustment, transportation, assembly and maintenance are all free. The distance between the open sliding grooves can be adjusted, and freedom degree and universality are achieved; the distance between the two crushing shafts can be changed in real time according to the working condition, the blocking problem is relieved in time, and the frequency of shutdown overhaul caused by winding or blocking is greatlyreduced.