This machine is an automatic folio combined buckle and knife folding machine with sheet pile feeding system. Parallel folding can be operated for two times with the bckle plate using ZYH670A folding machine.Parallel folding can be operated for four times with the buckle plate using ZYH670B folding machine. Its mode of folding includes parallel fold, concertina fold and letter fold. Vertical folding can be operated three times in combination of the buckle plates and the knives. Perforating, creasing and slitting can slao be operated during folding process as required. The fourth vertical folding can be operated for positive folding or negative folding as required by adjusting sheet turning device. The functions of 32mo two-up positive folding or negative folding are provided as required.