Deformation measuring and monitoring pier convenient to fix and disassemble

A deformation measurement monitoring pier convenient to fix and disassemble disclosed by the present invention comprises a bottom fixing unit, the bottom fixing unit comprises a base, a first connecting seat, a second connecting seat and a fixing assembly, the first connecting seat is arranged at the top end of the base, and the second connecting seat is arranged at the top end of the first connecting seat. The fixing assembly is arranged in the second connecting base. The middle supporting unit comprises an upper column body, a supporting column arranged at the bottom end of the upper column body and a lower column body rotationally connected with the supporting column, and the supporting column and the lower column body are connected with the fixing assembly; and the top bearing unit comprises a base arranged at the top end of the upper column body and a connecting assembly arranged at the bottom end of the base. The bottom fixing unit, the middle supporting unit and the top bearing unit are detachably conn