Machining center capable of conveniently adjusting clamping area

The utility model provides a machining center with clamping area convenient to adjust, and relates to the technical field of workpiece machining, the machining center with clamping area convenient to adjust comprises a first clamping plate and a second clamping plate which are used for clamping a workpiece, the lower surface of the second clamping plate is fixedly connected with a rack, the rack is meshed with a gear, and the gear is meshed with the first clamping plate. An adjusting wheel disc is arranged at one end of the gear, a positioning rod is fixedly connected to one side of the adjusting wheel disc, a supporting block is connected to one end of the positioning rod in a clamped mode, and the positioning rod fixed to one side of the adjusting wheel disc rotates so that a second clamping plate fixed with a rack can move left and right; an adjusting wheel disc with a fixedly-installed gear installed at one end rotates, the adjusting wheel disc drives a second clamping plate to move stably and rapidly thr