Safe and adjustable fixing system convenient for aluminum square tube ceiling

The utility model provides a safe adjustable fixing system convenient for aluminum square tube ceiling, which comprises a switching component, the switching component comprises two U-shaped switching connector assemblies, two hanging bars, a T-shaped switching piece and two angle steels, the lower ends of the two hanging bars are respectively fixedly connected with the upper ends of the two U-shaped switching connector assemblies, and the upper ends of the two hanging bars are fixedly connected with the T-shaped switching piece. The upper ends of the two hanging bars are fixedly connected with the two ends of a flange plate in the T-shaped adapter respectively, the two steel angles are symmetrically arranged on the two sides of the upper end of a web plate in the T-shaped adapter, one ends of the two steel angles are fixedly connected with the upper end of the web plate in the T-shaped adapter, the other ends of the two steel angles are fixedly connected with the rear embedded plate, and the rear embedded pla