The utility model relates to a fan bearing oil collecting device which comprises a bearing seat, a fan main shaft penetrates through the bearing seat in the axial direction, and the bearing seat is connected with the main shaft in a rotating mode. The oil collecting device comprises a rotating cylinder, a plurality of oil guide pipes and a plurality of sweeping pieces, the rotating cylinder is fixed to the main shaft, each oil guide pipe is fixed to the inner wall of the rotating cylinder, and each oil guide pipe is provided with the corresponding sweeping piece capable of sweeping the joint of the bearing end cover; and the oil storage tank is fixed on the bearing seat and is used for receiving grease in the oil collecting device. According to the oil collecting device for the fan bearing, oil leaked from the bearing can be quickly collected, the situation that the leaked oil pollutes a cabin and the external environment is avoided, and the collected oil can be repeatedly supplied toa machine body.