Automatic cutting device for metal parts

The utility model relates to an automatic metal part cutting device which comprises a working table, a mounting groove is formed in the inner side of the working table, a first lead screw is rotationally connected to the inner side of the mounting groove, an adjusting motor is fixedly connected to the left end face of the working table, and a main shaft of the adjusting motor is fixedly connected with a second lead screw through a coupler. The outer side of the second lead screw is spirally connected with a first sleeve piece, the outer side of the first lead screw is spirally connected with a second sleeve piece, one side of the first sleeve piece is fixedly connected with a limiting sliding block, one side of the second sleeve piece is fixedly connected with a connecting sliding block, and adjusting sliding grooves are formed in the inner side of the top end face and the inner side of the bottom of the workbench. The cutting device has the advantages that the cutting device is simple in structure and conven