Box-type steel member capable of preventing rainwater erosion

The utility model discloses a rainproof box-type steel member which comprises a box-type column, reinforcing assemblies are welded in the box-type column at equal intervals, positioning blocks are fixedly installed on the left side and the right side of the upper portion of an inner cavity of the box-type column, and fixing blocks are fixedly installed on the left side and the right side of the lower portion of the inner cavity of the box-type column. The reinforcing assembly comprises a reinforcing plate, a lightening hole and a reinforcing block, the reinforcing assembly is welded to the inner wall of the box column, a plug pin rod is arranged on the lower portion of the fixing block, a plug pin hole is formed in the middle of the outer surface of the upper end of the positioning block, and a threaded hole is formed in the middle of the outer surface of the upper end of the fixing block. A threaded section is arranged on the outer wall of the upper portion of the bolt rod, and a semicircular plug is fixedly