Net sweeping structure and net cage

The invention provides a net sweeping structure and a net cage, and relates to the technical field of mariculture. The net sweeping structure comprises a first net sweeping mechanism and a second net sweeping mechanism which are arranged in the net cage, the first net sweeping mechanism comprises a sliding part and a net body which are connected with each other, the contour shape of the net body is matched with the contour shape of the inner wall of the periphery of the net cage. The net body is connected with the inner wall of the net cage through the sliding part, and the net body is suitable for being driven by the sliding part to move in the net cage in the horizontal direction; and the second net sweeping mechanism is arranged at the end of the net cage, and the second net sweeping mechanism is suitable for rotating along with the net cage. Fish schools in the net cage are driven to the end provided with the second net sweeping mechanism through horizontal movement of the first net sweeping mechanism, pr