The invention relates to the field of building measurement, in particular to a measuring device for building
engineering management, which comprises a cylinder body, a guide rod, a thin film and a floating ring, the bottom of the
barrel is filled with liquid; the guide rod is vertically arranged in the cylinder body; the floating ring is sleeved outside the guide rod; the thin film is cylindrical and is sleeved outside the guide rod, one end part of the thin film is attached and fixed outside the guide rod, and the other end part of the thin film is fixed on the outer ring of the floating ring; a sealed inflation chamber is defined among the inner and outer
layers of the film, the liquid surface and the outer wall surface of the guide rod; a hollow cavity which is in one-way communication with the inflation cavity is formed in the guide rod and used for inflating the inflation cavity. The floating ring and the guide rod are separated through the inflation cavity, friction does not exist between the floating ring and the guide rod, the guide rod does not hinder ascending or descending of the floating ring, and the sensitivity of the floating ring is improved. And when the floating ring moves along with the change of the liquid level, the inflation chamber provides correction force for the floating ring through the thin film, so that the floating ring and the guide rod are kept coaxial.