Inverted supporting hanging rod and construction method thereof

An inverted supporting hanging rod comprises a light steel main keel (5), a M10 galvanized self-detonating fully-threaded hanging rod (14), a support (7) and a structural plate (13) and is characterized in that the M10 galvanized self-detonating fully-threaded hanging rod (14) comprises an expansion bolt sleeving pipe (15), an expansion bolt head (16) is arranged inside the expansion bolt sleeving pipe (15), an expansion bolt stainless steel spring gasket (18) is arranged at the lower end of the expansion bolt head (16), a self-detonating nut (11) is arranged under the expansion bolt stainless steel spring gasket (18), a fully-threaded hanging rod (6) is arranged under the self-detonating nut (11), an external supporting structure (17) is sleeved on the fully-threaded hanging rod (6), the lower end of the fully-threaded hanging rod (6) is fixed with the support (7), and the support (7) is fixed on the light steel main keel (5). The inverted supporting hanging rod has the advantages of being simple to construc