Tool for machining main box body

The utility model relates to the technical field of cavity type large product machining, in particular to a tool for machining a main box body. In order to improve the machining quality and machining efficiency of a main box body, the tool for machining the main box body comprises a base and a locking piece, the locking piece is installed on the base, and when the main box body to be machined is placed on the base, the locking piece can press the main box body to be machined. When the main box body is machined, the main box body to be machined is placed on the base of the tool for machining the main box body, the locking piece is used for pressing the main box body to be machined so that the main box body to be machined can be kept fixed, and the phenomena of vibration, cutter relieving and the like which are prone to occurring in the machining process of the main box body to be machined can be relieved. Therefore, the processing quality and the processing efficiency of the main box body can be effectively im