The utility model discloses a built on stilts formula steel sheet silo grain unloading device, include silo and the supporting seat that is used for supporting the silo, at the bottom of the silo included the storehouse body and storehouse, the bottom was equipped with grain unloading opening at the bottom of the storehouse, and grain unloading opening department installs and be used for controlling the valve that grain unloading opening open / closed, was fixed with the oblique elephant trunk that delivers from godown bottom the wall of storehouse side, the oblique elephant trunk that delivers from godown is including the inlet pipe portion that lies in storehouse body lower part axial direction line department, and the bottom of inlet pipe portion is connected with 1 at least conveyer pipe portion, and conveyer pipe portion passes and stretches out cang ticebi along the decurrent orientation of slope, and there is a discharging pipe portion at the conveyer pipe position in the external end connection in storehouse, discharging pipe portion extends along vertical decurrent direction, be equipped with the bracing piece that is used for consolidating the oblique elephant trunk thatdelivers from godown in the silo. The utility model discloses a built on stilts formula steel sheet silo center discharging method is establish to the oblique elephant trunk that delivers from godown,makes grain utilize gravity to flow automatically and delivers from godown, ensure the safety of putting out cereal, have simple structure, low in cost, reduction logistics cost, suitability can be good etc. The advantage.