Combined three-dimensional composite drainage network

The utility model relates to the technical field of three-dimensional composite drainage nets, and discloses a combined three-dimensional composite drainage net which comprises a drainage net main frame, an installation frame is installed in the drainage net main frame, longitudinal net ribs are fixedly connected to the inner wall of the installation frame, transverse net ribs are fixedly connected to the inner wall of the installation frame, and the longitudinal net ribs and the transverse net ribs are fixedly connected to the drainage net main frame. The longitudinal net ribs are fixedly connected to the tops of the transverse net ribs, the mounting frame and the transverse net ribs are both mounted at the top of the clamping frame, the outer wall of the mounting frame is fixedly connected with a rotating switch mechanism, and the outer wall of the rotating switch mechanism is fixedly mounted on the outer wall of the drainage net main frame. According to the drainage net, the main drainage layer, the compos