The utility model discloses an automatic edge forming machine which comprises a work table, a machine case, a sewing machine head and an operation table. The work table is connected with the machine case through a support column, a lifting device is arranged in the support column, the lifting device is connected with the operation table arranged on one side of the machine case, an operation table guide rail is arranged in the machine case, and the sewing machine head is arranged on the operation table. The work table is provided with an overturning device and a pushing plate. The work table is further provided with four cross rods, and the sewing machine head is provided with an edge fixing clip device. The overturning device comprises two overturning rods, a pull rope, a pulley support and a suspension pulley. The edge fixing clip device comprises a support and at least two clips, the support is fixed on the sewing machine head in a hinging mode, the clips are hinged to the support, and two rollers which are vertically symmetrical are arranged on the clips. The machine has the advantages of being simple in structure and capable of achieving mechanical automation, improving working efficiency, reducing production cost and machine purchase cost.