The invention relates to a multifunctional construction tool for a power pipeline. The multifunctional construction tool comprises a vertical ladder and a gas detecting device, wherein the gas detecting device comprises a gas detector and a gas sensing module connected with the gas detector; the vertical ladder comprises a plurality of cross bars, a first vertical bar and a second vertical bar; the first vertical bar is a hollow pipe and is provided with an exhaust fan; an air inlet of the exhaust fan is connected with the lower half part of the first vertical bar; an air outlet of the exhaustfan is connected with the upper half part of the first vertical bar, so that the first vertical bar is used as an exhaust channel; a plurality of air inlet holes are formed in the lower half part ofthe first vertical bar; the gas detector comprises a microprocessing module, a display module, an alarm module and a power supply module. The multifunctional construction tool for the power pipeline,provided by the invention, is convenient to use; multiple functions are realized by one object through reasonable combination of the ladder, detecting equipment, exhaust equipment, draining equipmentand illuminating equipment, and the condition of numerous and disorderly construction tools is avoided.