Button heightening device of automatic button sewing machine

The invention discloses a button heightening device of an automatic button sewing machine. The button heightening device comprises a workbench, wherein the workbench is provided with a nose, one side of the nose is provided with a needle head, two button clamping plates used for fixing a button is arranged below the needle head, one end of each button clamping plate used for clamping the button is horizontal, the other end of each button clamping plate is fixedly connected with the workbench through a fixing plate, a heightening device is fixedly arranged on the fixing plate and comprises a heightening part, a bending part and a fixing part fixedly connected with the fixing plate which are arranged in sequence, the heightening part is positioned above the button clamped by the button clamping plates, and a distance is reserved between the heightening part and a plane in which the button is positioned. The button heightening device of the automatic button sewing machine can heighten a thread for sewing the but