Three-point press machine

The utility model discloses a three-point press machine. A workbench is fixed to a frame. A supporting plate is fixed to the workbench through columns. The frame is equipped with an oil cylinder mounting bearer that is arranged above the supporting plate. A charging slideway is fixed to the workbench. A press mechanism is fixed to the oil cylinder mounting bearer. A limiting plate is disposed below the press mechanism, and is fixed to a lower transverse plane of the supporting plate via rods. A plate holding mechanism is disposed below the limiting plate, is fixed to the workbench, and is positioned below the charging slideway. The plate holding mechanism is equipped with positioning pins and the limiting plate is arranged on the frame, so that workpieces supported by the plate holding mechanism cannot rotate during press mounting, parts in three points all can be pressed into the workpieces, and thus no parts are liable to be missed during press mounting.