Pretensioned prestressing steel tank concrete beam

The invention relates to a pretensioned prestressing steel tank concrete beam. The pretensioned prestressing steel tank concrete beam comprises a tank body, two tensioning plates, a plurality of prestressing steel tendons and concrete, wherein the tank body comprises an upper flange plate, a lower flange plate, two web plates which are positioned between the upper flange plate and the lower flange plate, and two head plates which are connected to the end parts of the upper flange plate and the lower flange plate; the two tensioning plates are respectively arranged on the outer sides of the head plates at two end parts of the tank body; the prestressing steel tendons are positioned in the tank body, and two ends of each of the steel tendons separately penetrate through the two tensioning plates; the concrete is cast in an inner cavity of the tank body. According to the pretensioned prestressing steel tank concrete beam disclosed by the invention, the manner that the prestressing steel tendons penetrate through