The utility model discloses a vertical shaft wind power generation device. The wind power generation device comprises flat plate straight blades, fixing inhaul cables, a protective box, a generator, supporting frames, a shaft protective sleeve, a bevel gear, a vertical transmission shaft and a horizontal transmission shaft. The multiple flat plate straight blades are arranged at the upper end of the vertical transmission shaft through the supporting frames; the lower end of the vertical transmission shaft penetrates through the shaft protective sleeve and then is arranged in the protective box and connected with one end of the bevel gear; the bevel gear, the horizontal transmission shaft and the generator are arranged in the protective box; the other end of the bevel gear is connected with one end of the horizontal transmission shaft, and the other end of the horizontal transmission shaft is connected with an output shaft of the generator; one ends of the three fixing inhaul cables are connected with the shaft protective sleeve, and the three fixing inhaul cables are evenly distributed in the circumferential direction. The vertical shaft wind power generation device has the function of stably generating power in any wind direction, the fixing inhaul cables and the shaft protective sleeve are connected and can fix the vertical shaft wind power generator, and the vertical shaft wind power generation device is easy to assemble and disassemble.