Installation method of single pile support structure for offshore wind turbine

The invention provides an installation method of a single pile support structure for a offshore wind turbine. The installation method of the single pile support structure for the offshore wind turbineis characterized by comprising the following steps that a foundation pile is installed, specifically, a single pile is transported to a wind field by a barge or an installing ship, the single pile isremoved from the ship by proper lifting equipment and lowered to the surface of the sea floor for piling or for drilling out pile holes at appropriate positions by a drill, and then the pile is inserted into the pile holes; scour protection is carried out, specifically, scour protection measures around the foundation pile are adopted; a transition section is carried out, specifically, the transition section is located at the top of the foundation pile and is used for providing a flange platform to ensure that an upper tower drum is connected with the foundation pile, the offset of the foundation pile is corrected, and