The invention belongs to the field of constructional engineering and particularly relates to a water supply pipeline construction method. The water supply pipeline construction method comprises the steps that construction preparation is performed; pipeline preparation is performed, wherein a first pressure sensor and a second pressure sensor are installed at two ends of the inner wall of a pipeline; the pipeline is installed, wherein the connected parts of the pipeline uses seal rubber rings as gaskets, and humidity sensors are installed outside the seal rubber rings. According to the water supply pipeline construction method, a water pressure value in the pipeline and the water leakage situation of the connected positions of the pipeline are monitored through the sensors, a construction period can be effectively shortened, the construction quality is improved, and a maintenance unit can be informed of the quality problem produced in the building construction process in time.