Paying off device for building construction site and using method thereof

The invention belongs to the technical field of building construction, and particularly relates to a paying off device for a building construction site and a using method thereof. The paying off device comprises a shell, supporting legs installed on the periphery of the bottom of the shell and used for supporting and a take-up pulley placed in the shell and used for winding wires. A paying off pipe communicates with the front surface of the shell, a handle is in bolting with the top of the shell, rotating assemblies are installed on one side the interior of the shell, and an auxiliary assemblyused for assisting the take-up pulley to wind is installed at the top of an inner cavity of the shell. Compared with an existing winding wire, winding is serious and is not prone to being unfastened,replacement is required, the using cost is low, the using smoothness is further improved, to a certain degree, the measurement efficiency is improved, and the problem of affecting time by jamming during measurement is solved,