The present invention relates to a mold for forming and cutting a composite preform. The mold consists of a lower mold and an upper mold located on the lower mold, where the lower mold includes a lower forming part and a lower cushion part, the lower forming part has a structure integrated to the upper part of a support plate, and the lower cushion part includes a main penetration part penetrated for the lower forming part to enter. The lower mold having a lower forming part located and assembled inside the main penetration part. Multiple springs are located between the upper part of the support plate and the bottom of the lower cushion part. Multiple retainer bolts are assembled on the bottom of the supporting plate to be fixed on the lower cushion part, and the bottom of the lower cushion part, the upper surface of the support plate has a certain distance, and the heights of parts where the lower forming part and the lower cushion part contact are similar, and the upper mold consists of an upper pusher part and an upper forming part.