Steel water tank

The utility model belongs to the technical field of engineering, and particularly relates to a steel water tank which comprises a water inlet, a water outlet, a tank body and a fixed frame arranged in the tank body. The box body is composed of a plurality of sealing plates, the sealing plates are in an outwards-protruding shape, the adjacent sealing plates are connected in a full welding mode to form an upper box wall, a lower box wall and four side box walls respectively, and the upper box wall, the lower box wall and the side box walls are perpendicular to one another. The fixed frame comprises an upper box wall long beam, an upper box wall short beam, a vertical beam, a lower box wall long beam, a lower box wall short beam and a connecting rod; according to the water tank, the fixing frame is arranged, the multiple sealing plates of the tank body are connected to form an integral structure, the structural strength of the water tank is improved, the damage resistance of the water tank is improved, the occur