Abstract：Based on the pressure distribution within the conical silo, a new method of calculating the curved silo can be obtained. The results show that under the assume that the dip angle of tangent in silo wall changes uniformly in horizontal direction, the structure equation of curve silo shaped like y =Alnx +B can be calculated. At the same height of the silos, the vertical pressure on curve silos is smaller than that on conical silo, so the phenomenon of blocking materials and arching does not occurred. After determining the size of feed inlet, the equation of discharge port of the tangent angle with the size of discharge port can be gained to avoid blocking material and arching and ensure the uniformity and stability.

Keywords：logarithmic curve; curve equation; wall friction angle; silo