Abstract: A shirt folding machine, comprising stroke adjustable neck opening fixation plates, revolvable shirt folding mold board, and ironing board; the shirt to be folded being slipped on the neck opening fixation plates that are arranged to relatively close to each other, by means of the separation of said neck opening fixation plates the neck opening of the shirt to be folded being fully stretched; by means of the clamping effect of the shirt folding board and the ironing board the shirt to be folded being firmly clamped therebetween for ironing process; by means of the support of the shirt folding mold board, the protruding portion of the shirt clamp being well folded, in accordance with the configuration of the shirt folding mold board, into preferred rectangular arrangement for distribution on the market.