The utility model relates to an enclose scattered grain stored up storehouse transverse ventilation system of package can effectively solve the transverse ventilation's of thin granary problem of oldgranary or wall body, and technical scheme is, including the granary with set up the main air duct in the granary, vertically on the main air duct be provided with a plurality ofly rather than the branch air duct that is linked together, have the ventilation hole of equipartition on the branch air duct, the just right both sides wall inboard of granary be provided with hug closely rather than theinner wall, by the enhancement layer that sack body closed assembly constitutes together, the backplate and the enhancement layer of main air duct and branch air duct are hugged closely, air intake and air outlet that both sides are link up inside and outside opening respectively on the wall, with on the backplate of the just right main air duct of air intake and air outlet division have a wind -guiding mouth, the utility model discloses novel structure is unique, and is simple reasonable, easy production, safe and reliable, fine solution old granary or wall body thin granary transverse ventilation's problem, make the side wall can bear the yawing force that grain is piled, safe and reliable compromises heat preservation, convenient to use is effectual.