The invention discloses a novel vertical-shaft fan structure of vertical shaft wind generating set, wherein the novel vertical-shaft structure is designed according to the unique blade operation characteristic of a vertical-shaft fan. In the invention, by virtue of the direct correlation among blades, a compact main shaft assembly, an installation mode and other construction, the availability factor of a wind wheel support part is exponentially improved, the power transmission paths of the blades are scattered, and the length of the arm of force of a transmission component is decreased, so that the stress uniformity is improved, the vibration source of the blades is removed, thus the intensity requirement of the wind wheel support part is exponentially reduced, and the intensity requirement of a hub and a main shaft is reduced at the same time, and the transportation and installation of the fan are convenient. Therefore, the fan structure in the invention has the advantages of small centrifugal load, light weight, easiness for installation, easiness for transport and low cost.