Vertical-shaft wind turbine

The invention relates to a vertical-shaft wind turbine which comprises a wind wheel, wind blade shafts, wind blades, a windward adjustment wheel, a rotating shaft, a gear box, a rotating wheel, a brake, a power generator and a tower. The vertical-shaft wind turbine is mechanical equipment which drives the power generator to generate power by the wind power of nature and overcomes the defect that the traditional vertical-shaft wind turbine has no windward device as the wind blades are stationary. The wind wheel is provided with six same wind blade shafts and six same wind blades, the wind blade shafts are provided with same cams and same return springs, and the windward adjustment wheel is assembled below the wind wheel. The wind wheel rotates horizontally under the action of the wind power, and the wind blades have the largest wind blade surface when rotating before the wind and the smallest wind blade surface when rotating against the wind. When the wind direction changes, the windward adjustment wheel is de