The invention discloses a structure combining a steel tower tube and a steel latticework tower of a wind turbine generator system. The structure comprises a wind generation set tower, wherein the wind generation set tower is formed through splicing and enclosing a plurality of prefabricated steel plates; each prefabricated steel plate mainly comprises a hoop rib, vertical ribs A, a vertical rib B, a steel plate, bolts A and bolts B; the upper and lower ends and the hoop rib of the steel plate are connected through welding; the left and right sides and the vertical ribs A of the steel plate are connected through welding, so as to form the prefabricated steel plate; the vertical rib B is arranged in the middle of the steel plate. The structure has the following benefits: (1) a framework main body is formed through adopting the steel latticework form as the connection manner, so that the anti-bending efficiency is improved; (2) tubby steel plates are adopted as the skin of the tower, so that lattice type components are reduced, and site construction progress is quickened; (2) the bottom diameter is appropriately larger than that of a steel tower tube with the same rigidity and bearing capacity, so that convenience is provided for later study of higher towers.