Clamping device for numerically-controlled machine tool

The utility model relates to the technical field of numerically-controlled machine tools. The utility model discloses a clamping device for a numerical control machine tool. The problems that a clamping device for a numerical control machine tool on the current market is seriously abraded; the integral replacement is needed; due to the adoption of the replacement mode, the loss of resources can becaused; generating large quantities of debris, excessive chippings cause slow operation of the clamping device. The normal use is influenced. It includes a base, a guide rail is fixed to the side face of an inner cavity of the base. A dust collection box is installed on the side face of the guide rail, a sealing cover is fixed to the bottom of the dust collection box, a magnet is installed at thetop of the sealing cover, the top of the base is in threaded connection with the middle of a retention rod through screws, an installation block is fixed to the top of the retention rod, a motor is installed in an inner cavit