Stepped milling cutter storage assembly for numerical control machining

The stepped milling cutter storage assembly for numerical control machining comprises a containing disc, a plurality of bases are fixedly connected to the upper surface of the containing disc in sequence from left to right, and a plurality of inserting grooves are formed in the upper surfaces of the bases in sequence from front to back. According to the stepped milling cutter storage assembly for numerical control machining, through cooperation of a containing disc, a base, a cutter, an inserting groove and a stability increasing assembly, a push plate and a rubber sleeve can slide downwards, due to the abutting relation between the rubber sleeve and the inner wall of a cavity shell, air in the cavity shell can be extruded into a cavity ring through a transverse pipe and a short pipe, and the stability of the cavity ring is improved; the inner air pressure of the cavity ring is increased, the volume is expanded, the cavity ring can abut against the cutter inserted into the inserting groove, then the stability