Multi-jaw chuck with adjustable number in precision machine tool

The utility model relates to the technical field of multi-jaw chucks, and discloses a number-adjustable multi-jaw chuck in a precision machine tool, which comprises a chuck body, a plurality of clamping jaws and a plurality of clamping jaws, the number adjusting assembly is arranged at the bottom of the chuck body and comprises a plurality of clamping jaw seat grooves and first bolts, the clamping jaw seat grooves and the first bolts are evenly formed in the bottom of the chuck body, clamping jaw seat bodies are inserted into the clamping jaw seat grooves, and first threaded holes and second threaded holes are formed in the front sides and the rear sides of the clamping jaw seat bodies respectively. The first threaded grooves are formed in the clamping jaw seat grooves, the clamping jaw seat grooves can be conveniently connected with the clamping jaw seat bodies and the clamping jaw bodies, the multiple clamping jaw seat grooves are formed in the bottom of the chuck body, the clamping jaw seat bodies are conn