Quick-change tool switching and positioning device

The quick-change tool transfer positioning device comprises a numerical control machine tool platform, a T-shaped groove is formed in the top of the numerical control machine tool platform, a main positioning pin block assembly and a Y-direction positioning pin block assembly are arranged on the inner wall of the T-shaped groove, and the top of the main positioning pin block assembly and the top of the Y-direction positioning pin block assembly are movably connected with part tools. A main positioning hole and an original point hole are formed in the left side of the top of the part tool. The tool has the advantage of being high in machining efficiency, and the problems that when the tool is installed on a machine tool platform, the tool is not convenient to straighten and align, the installation efficiency of the tool is reduced, after the part is installed, the machining original point of the part is not convenient to position, the machining efficiency of a machine tool is reduced, and when a quick-change t