The invention discloses a safety warning bracket applicable to steel-pipe towers. The safety warning bracket comprises a installing bracket in a shape of chinese character of mu and a plurality of steel-pipe tower safety warning boards arranged on the installing bracket, wherein the installing bracket consists of two A-type angle steels, two D-type angle steels, a B-type angle steel and a C-type angle steel; the two A-type angle steels form an upper edge and a lower edge of the installing bracket, the two D-type angle steels form a left edge and a right edge of the installing bracket, and parallel to the A-type angle steels, the B-type angle steel and the C-type angle steel are arranged in a rectangular frame formed by the two A-type angle steels and the two D-type angle steels; the plurality of steel-pipe tower safety warning boards are arranged in an upper frame formed by the B-type angle steel, the two A-type angle steels and the two D-type angle steels; the plurality of steel-pipetower safety warning boards are arranged in a lower frame formed by the C-type angle steel, the two A-type angle steels and the two D-type angle steels; fastening devices for fixing the installing bracket on the steel-pipe tower is also arranged on the installing bracket. The safety warning bracket disclosed by the invention has the advantage that the problem of no warning boards on the steel-pipetower is solved.