Head of ziplock bag film blowing machine

The utility model discloses a head of a clip chain valve bag film blowing machine, which comprises a housing (1) and an inner core (2) in an inner chamber of the housing (1), wherein the outer edge of the inner core (2) is provided with a plurality of pairs of power of number of two of negative grooves (3) and positive grooves (4) in an equidistant mode, and each pair of negative groove (3) and positive groove (4) are contiguous. A long cylinder bag extruded by the utility model is provided with a plurality of pairs of contiguous concave bands and convex bands, and each pair of concave band and convex band pass through a center of circle to be cut into a plurality of small bags. Thus, the production efficiency is increased, and meanwhile, bags with minor specification can be produced.