Flexible installation system for offshore wind turbine generator set and application thereof

The invention discloses a flexible installation system for an offshore wind turbine generator set and application thereof. The flexible installation system comprises a balance device and a flexible butt joint device, wherein, the balance device is arranged at the upper part of a wind turbine body and plays a role of balancing, the balance device comprises balance beams which are symmetrically arranged on the right side and the left side, and the middle part of the balance beams is equipped with a hollow installation part corresponding to the wind turbine body; and the flexible docking device comprises an upper lifting frame and a lower frame body, wherein, the upper lifting frame is connected with the root of the wind turbine body and is equipped with a buffer gear, the lower frame body is connected with a tower tube base of an offshore base platform and is equipped with a bearing mechanism which plays a role of bearing the upper lifting frame and the wind turbine body, and the lower frame body is corresponding to the upper lifting frame. By utilizing the flexible installation system, the offshore wind turbine generator set can be safely and steadily installed.