Supporting and fixing device for polymer waterproof roll welding

The utility model discloses a supporting and fixing device for polymer waterproof coiled material welding, which comprises a welding equipment main body, a connecting shaft is rotatably mounted in the welding equipment main body, a pinch roller is mounted at the end part of the connecting shaft, a fixing frame is fixedly mounted on one side of the welding equipment main body, and the fixing frame is fixedly mounted on the other side of the welding equipment main body. Before welding is started, overlapped coiled materials located on the upper layer are lifted up and connected to the supporting assembly at the upper end in a lap joint mode, the two ends of the tilting part are pressed below the pressing wheels, then the welding equipment body is pushed to move forwards, and the coiled materials are welded to the upper layer through the pressing wheels. The supporting assembly can support the coiled material all the time in the welding process, a worker does not need to bend down for operation for a long time,