Novel metal roof expansion joint node

The utility model discloses a novel metal roof expansion joint node which comprises a metal roof, an expansion joint is arranged on the opposite side of the metal roof, an installation base is arranged at the upper end of the metal roof in an attached mode, and an aluminum alloy support is fixedly installed at the upper end of the installation base through an expansion bolt. The upper ends of the two sides of the aluminum alloy support are connected with a waterproof panel through fixing mechanisms, a positioning inserting groove is formed in one side of the waterproof panel, and the lower end of the opposite side of the mounting base is connected with a fire retardant belt in the expansion joint. The connecting position of the mounting base and the metal roof and the connecting position of the aluminum alloy support and the mounting base are filled with waterproof sealant, the fixing mechanism comprises positioning inserting plates, the positioning inserting plates are integrally formed at the lower ends of