Building construction plummet for measurement

The invention discloses a building construction plummet for measurement, relating to the technical field of building construction tools. The plummet comprises a fixing frame, a sliding bar is in sliding fit inside the fixing frame, a supporting plate is fixed at one end of the fixing frame, a surface of the supporting plate is provided with a fixing hole, a clamping plate is fixed at one end of the sliding bar, a rotating mechanism is fixed on one surface of the supporting plate, a fixing mechanism and a pay-off mechanism are fixed on one surface of the rotating mechanism, and a plummet body is fixed on the pay-off mechanism through a connecting line. According to the plummet, the measuring precision is high, the plummet is convenient to fix, the stable effect is good, the length of a pullrope for the plummet is convenient to adjust, the distance of a clamping rod can be adjusted according to the thickness of a wall surface, the measurement precision is increased, meanwhile, the plummet can be applied to wall