Construction protection support convenient to combine and assemble

The construction protection support convenient to combine and assemble comprises a movable base, a hydraulic connecting column and an external connection assembly, a prompt lamp column is installed on one side of the movable base, the hydraulic connecting column is inserted into the top end of the movable base, a beam column is installed at the end, away from the hydraulic connecting column, of a buffer column, and the beam column is inserted into the buffer column. An anti-collision layer is arranged on the side, away from the auxiliary telescopic layer, of the sealing telescopic layer, and the external connection assemblies are installed on the two sides of the anti-collision layer. According to the construction protection support convenient to combine and assemble, by means of the movable base, the prompt lamp post and the balance weight base, the protection support has mobility, meanwhile, striking prompts can be made for the surroundings, and by means of a hydraulic connecting column, a buffer column and