Precast concrete jacket type offshore wind turbine foundation

The invention relates to a precast concrete jacket type offshore wind turbine foundation. The offshore wind turbine foundation is characterized by comprising an reinforced concrete frame precast ashore, foundation piles and a cap beam, wherein the reinforced concrete frame precast ashore comprises upper and lower guide beams, a connecting beam, stand columns and a core tube; reserved pile holes are evenly distributed in the upper and lower guide beams; the foundation piles penetrate through the reserved pile holes; a plurality of stand columns are evenly distributed between the upper and lower guide beams; a cylindrical core tube is arranged in the center of the upper and lower guide beams; the core tube is connected with the upper and lower guide beams through the radial connecting beam to form an integral structure; the cap beam is arranged on the surface of the upper guide beam; and the cap beam, the reinforced concrete frame and the foundation piles form an integral precast concrete foundation structure. The precast concrete jacket type offshore wind turbine foundation has the benefits as follows: a traditional practice that offshore gravity type foundations adopt conventional cast-in-place concrete foundations is changed, the lighter reinforced concrete structure frame is precast ashore firstly and then placed at the seabed of a coastline, and precast foundation piles are inserted into and fixedly connected with the frame to form the integral foundation, and the integral wind turbine foundation which is firm and resistant to wind waves can be built.