The utility model discloses a can set up tension leg platform of wide flotation tank - WTLP, include the upper portion chunk, descend four major parts such as body, tension leg system and bottom basis, the stand is established at upper portion chunk downside and is supported the upper portion chunk, respectively is equipped with a plurality of tension leg on the angle point of lower body bottom and links to each other with the bottom basis, provides decurrent pulling force with fixed platform to the platform. This WTLP platform because of circular stand and square flotation tank between adopted the changeover portion connection structure of " the square circle that changes ", thereby can be on the basis of adopting circular stand with guarantee platform performance on the throne, design the flotation tank wideer and increase bottom buoyancy and improve from floating the stability, be favorable to realizing upper portion chunk and the whole construction of body down in pier and channel depth limited construction place, and can adopt the wet transport means who drags, the design of simultaneously wide flotation tank also helps designing the flotation tank thinner, thereby be favorable to reducing the stream load that the platform received when on the throne and improve the performance on the throne of TLP platform.