High-speed spindle motor for numerical control machine tool

The utility model relates to the technical field of numerical control machine tools, and discloses a high-speed spindle motor for a numerical control machine tool, which comprises a casing, a stator movably sleeved on the inner side of the casing, a rotor movably sleeved on the inner side of the stator, and a rotating shaft mounted on the inner side of the rotor. According to the high-speed spindle motor for the numerical control machine tool, the bearing shell is mounted on the inner side of the machine shell to move through the bearing shell with the conical outer portion, the bearing shell is conveniently driven to be clamped in the machine shell through the bearing shell with the conical outer portion, and a first sealing cover plate is mounted on the outer side of the bearing shell; the first sealing cover plate extrudes and limits the positions of the bearing outer shell and the bearing inner shell, that is, when the first sealing cover plate can carry the position of the bearing outer shell to be insta