Color printing composite packaging bag

The utility model discloses a color printing composite packaging bag which comprises a bag body, a buffer layer is arranged on the outer side of the bag body, supporting pieces are fixed to the two sides of the bag body, each supporting piece comprises three sets of connecting bases, and the three sets of connecting bases are fixed to the two sides and the middle of the bag body respectively. The middle connecting base and the two side connecting bases are movably arranged through two sets of connecting rods and a set of rotating pieces respectively, the buffer layer is of a hollow structure filled with gas, and through the arranged three sets of connecting base structures, when the bag body is filled with objects and stored with gas, the bag body expands, and the supporting pieces on the two sides of the outer portion of the bag body can protrude outwards; the connecting rods and the rotating pieces on the two sides of the connecting base in the middle can rotate through the rotating shafts and the connectin