The invention discloses an annular reinforced composite braking drum, relating to a braking drum. The annular reinforced composite braking drum comprises a drum body, wherein the outer surface of the drum body is provided with a plurality of annular ribs. When the annular reinforced composite braking drum is in use, circumference force applied to the braking drum can move along the directions of the annular ribs, so that main stress is concentrated on the annular ribs, and the stress of an inner hole of the drum body is greatly reduced; moreover, the annular ribs are arranged on the outer surface of the drum body, so that not only can the strength of the drum body be enhanced, but also the heat dissipation can be realized, and the drum body is prevented from being cracked due to being heated under a long-time braking condition. The end surface of each annular rib is of a double-peak structure, so that the stress and heat dissipation area of each annular rib can be increased, the stress of the inner hole of the drum body is further lowered, and the heat dissipation effect is also further improved. According to the annular reinforced composite braking drum, an alloy steel strip is further embedded in the annular ribs at the orifice of the drum body, so that the strength of the orifice is improved, the orifice is prevented from being cracked, and the situation that the edge of the inner hole is cracked under the stress is reduced. According to the annular reinforced composite braking drum, the drum body is made of wear-resistant materials, so that the wear resistance and heat conductivity can be improved, and the effects of simple structure and easiness in popularization and application are achieved.