Tank reinforcement plate of tank car

The invention relates to a tank reinforcement plate of a tank car. The tank reinforcement plate comprises an end socket reinforcement plate, a corbel reinforcement plate and a draft sill reinforcement plate, wherein the end socket reinforcement plate is connected with the longitudinal back end of the draft sill reinforcement plate, the corbel reinforcement plate is arranged at a middle section of the draft sill reinforcement plate, and a longitudinal front end part of the draft sill reinforcement plate is of an overall arc structure. With the adoption of the tank reinforcement plate, the stress concentration level of a tank body in the tail region of the draft sill reinforcement plate is effectively reduced, and the tank reinforcement plate has a simple structure, is convenient to manufacture, and is suitable of production process and equipment of the existing railway tank cars in China.