Fixed covering device for lung cancer radiotherapy

The invention relates to a fixed covering device, in particular to a fixed covering device for lung cancer radiotherapy. The invention aims to provide a fixed covering device for lung cancer radiotherapy, which can completely block redundant radioactive rays. A fixed covering device for lung cancer radiotherapy comprises a supporting plate, annular sliding rails, a guide frame, a guide frame, suckers and the like, the annular sliding rails are connected to the left portion and the right portion of the supporting plate, the guide frame is arranged between the annular sliding rails in a sliding mode, the guide frame is arranged on the guide frame in a sliding mode, and the suckers are connected to the front side and the rear side of the top of the guide frame. The isolation strips can block redundant radioactive rays and prevent the redundant radioactive rays from hurting healthy parts of a patient, and the isolation strips are evenly arranged at intervals and can be adjusted more finely, so that the isolation