Traction transformer oil tank and rail transit vehicle

The invention discloses a traction transformer oil tank and a rail transit vehicle. The traction transformer oil tank comprises an oil tank body arranged in the vehicle, a first mounting piece and a second mounting piece; wherein the first mounting piece is provided with a first reinforcing part used for extending to the bottom wall of the oil tank body for reinforcing, and the second mounting piece is provided with a second reinforcing part used for extending to the bottom wall of the oil tank body for reinforcing. By means of the device, the oil tank is arranged in the vehicle, compared with an original installation mode that a traction transformer is arranged at the bottom of the vehicle, the space in the height direction is increased, and problems that due to the fact that the height space is limited when the traction transformer is installed at the bottom of the vehicle, the oil tank is large in length and width and high in sealing performance requirement are solved; the influence of external rainwater,