Civil engineering building construction support

The civil engineering building construction support comprises a bottom plate, a supporting outer column is fixedly connected to the top of the bottom plate, a cavity groove with an upward opening is formed in the supporting outer column, a lifting inner column is movably connected into the cavity groove, and the supporting outer column and the lifting inner column are both of a tubular body structure. A top plate is fixedly connected to the top of the inner lifting column, an integrally-formed external thread section is arranged on the upper portion of the outer wall of the outer supporting column, a height adjusting assembly is arranged between the outer supporting column and the inner lifting column, the external thread section is sleeved with an anti-disengaging assembly, and horizontal adjusting assemblies are arranged at the four corners of the bottom plate correspondingly. Height adjustment can be carried out according to the position of the formwork, and meanwhile the formwork can adapt to the uneven g