Prefabricated high pile cap foundation and offshore wind power system

The invention discloses a prefabricated high pile cap foundation and an offshore wind power system.The prefabricated high pile cap foundation comprises a plurality of pile foundations, a bottom plate, a concrete cap and prestressed tendons, the bottoms of the pile foundations are inserted into a seabed, the bottom plate is installed on the top of each of the pile foundations, the concrete cap is installed above the bottom plate, and the prestressed tendons are arranged on the concrete cap; the concrete bearing platform comprises a plurality of precast concrete blocks, the precast concrete blocks are spliced to form the concrete bearing platform, and the prestressed tendons are arranged on the concrete bearing platform in a sleeving mode and apply prestress. According to the prefabricated high pile cap foundation provided by the embodiment of the invention, the site construction of the concrete cap on the high pile cap foundation bottom plate is changed into the construction of the concrete cap by splicing the