Engineering construction mounting bracket convenient to adjust

The utility model discloses an engineering construction installation support convenient to adjust in the technical field of engineering construction installation accessories, which comprises a fixed support, and the outer surface of the fixed support is sleeved with a first fixed plate, a movable plate and a second fixed plate. An adjusting assembly and a limiting assembly are jointly connected among the first fixed plate, the movable plate and the second fixed plate, a bearing plate is connected to one side of the second fixed plate, a positioning plate is connected to the surface of the top end of the other side of the bearing plate through a first rotating part, and the other end of the positioning plate is connected with one side of the movable plate through a second rotating part; the positioning plate is provided with a plurality of groups of auxiliary supporting assemblies, the surface of the top end of the positioning plate is provided with a solar photovoltaic panel, the solar photovoltaic panel supp