The utility model relates to a sewing machine accessories especially relates to an automatic folder. The utility model discloses an automatic folder opens up fabric swatch, backfolding bent plate on,and opens up the fabric swatch under and including the advance fabric swatch, the preceding board of bending connected in order, backfolding bent plate length is less than before the board length of bending, under open up the fabric swatch and be located on open up the fabric swatch with advance between the fabric swatch, under open up fabric swatch length and be less than on open up fabric swatchlength, under open up the fabric swatch with it is equipped with into bu kou to advance between the fabric swatch, under open up the fabric swatch with before bend the board and be equipped with intocloth channel, before bend the board bottom and be provided with fixed connector. The utility model discloses an automatic folder has advantages such as simple structure, convenient operation, not only can improve the efficiency of making up the product simultaneously, but also can improve the quality of making up the product.