Square bottom valve bag with bottom turnover supporting mechanism

The utility model relates to the technical field of packaging bags, in particular to a square-bottom valve bag with a bottom turnover supporting mechanism, which comprises a main bag body consisting of film coating cloth, an isolating layer and a damp-proof layer. According to the square bottom valve bag with the bottom overturning supporting mechanism, the folding storage grooves internally provided with the bottom installation blocks are formed in the lower surface and the two side faces of the main bag body; the lateral movable brackets on the two sides of the transverse assembly rod are movably connected with the lateral turnover support rods; overturning telescopic supporting rods are movably connected to the transverse assembling rods and the lateral overturning supporting rods through connecting assembling rings; external connecting rings with top openings in the top ends of the overturning telescopic supporting rods are arranged on the strip-shaped assembling belts at the corresponding positions in a