Material frame positioning assembly

The utility model discloses a material frame positioning assembly which is composed of four positioning frames, the four positioning frames are arranged on a base in a quadrangle shape, and the four positioning frames are located at the four vertex angles of the quadrangle respectively. Each positioning frame comprises a square cavity with an opening in the top, the two adjacent side edges of eachsquare cavity extend upwards, and the top ends of the extending parts are turned out towards the outside of the cavities. According to the utility model, the adjacent edges of the periphery of the positioning frame extend upwards; and the edge which is turned outwards is designed at the top end of the extending position, so that the material frame placed on the positioning assembly can automatically slide to the corresponding position according to the dead weight, and the material frame can be placed at the required placing position without additionally positioning the placing point of the material frame or adjusting