The invention discloses a wind dehydration device. The device comprises a blade, a rotation shaft, a rotation shaft gear, a transmission gear, a fixed gear, a fixed rod, a fixed disc, a rotation cylinder and an outer box. The blade is fixed at the top of the rotation shaft which is arranged in the fixing rod, the rotation shaft gear is arranged on the lower portion of the rotation shaft and is connected with the transmission gear, the transmission gear is connected with the fixed gear, the fixed rod is fixed on the fixed gear, and the fixed disc is arranged at the top of the fixed rod and is located at the bottom of the rotation cylinder. The device is capable of working through wind, simple in unit and principle, simple to operate, low in failure rate and energy saving and environmentally friendly.