The invention discloses a wind power rubbish separating device which comprises a box body. The upper side of the left side face of the box body is fixedly connected with a large motor, and the large motor is fixedly connected with a fan in the box body. A bearing support is installed at the right side of the fan, and the center position of the bearing support is fixedly connected with a bearing. The bearing is fixedly connected with one end of a rotating shaft, and the other end of the rotating shaft is fixedly connected with a large belt pulley. The large belt pulley is fixedly connected with a small belt pulley through a belt. The small belt pulley is placed above the outside of the box body. The small belt pulley is fixedly connected with a small motor, and the small motor is fixedly connected with the upper side of the box body. According to the wind power rubbish separating device, due to arrangement of the fan, rubbish of different weights can be separated with wind power, the trouble of manual separation is saved, and moisture in the rubbish can be separated out independently so that follow-up treatment of the rubbish can be made more convenient.