Automatic chip mounter

An automatic chip mounter provided by the present invention comprises a lathe bed, the upper surface of the lathe bed is fixedly provided with a workbench, the middle area of the upper surface of the workbench is provided with a substrate placement area, and the substrate placement area is provided with a substrate positioning assembly used for clamping and positioning substrates of different sizes. The clamping and positioning assembly comprises base plate fixing blocks which are installed at the front end and the rear end of the upper surface of the workbench and are parallel to each other, and a base plate moving block which is parallel to the two base plate fixing blocks and moves front and back is arranged between the two base plate fixing blocks. The substrate placement area and the IC placement area are respectively arranged on the surface of the workbench, the material taking and surface mounting distance of the surface mounting head is effectively reduced, the working time is shortened, the substrate