Integral mounting assisting device and mounting method for tension leg type offshore floating wind turbine

The invention discloses an integral mounting assisting device and a mounting method for a tension leg type offshore floating wind turbine. The integral mounting assisting device comprises assisting modules, eye plates, stop pins, a plurality of oil cylinders, positioning winches and steel wires, wherein the assisting modules are mounted outside a multi-column tension leg type offshore floating foundation of the wind turbine, the eye plates are detachably connected on circumferential columns of the multi-column tension leg type offshore floating foundation, the oil cylinders are disposed on the lateral sides and the bottom surfaces of the assisting modules, the cylinder bodies of the oil cylinders are fixed on the assisting modules, the stop pins are hinged with cylinder rods of the oil cylinders and are driven to be inserted into holes of the eye plates by the oil cylinders, the positioning winches are fixed on the tops of the assisting modules, one ends of the steel wires are connected with the positioning winches, and the other ends of the steel wires are connected with positioning anchors thrown to the seabed. Sufficient stability, buoyancy and assisting positioning can be provided for mounting of the tension leg type offshore floating wind turbine, offshore operation time is greatly saved, mounting cost is reduced, and the integral mounting assisting device is applicable to construction of a large-scale offshore floating wind power plant.