Through taking the construction of water supply and drainage pipeline in the electromechanical installation of F City Metro Line 2 phase I project as an example,the study puts forward construction process and operation method.There are strict construction requirements of the underground pipeline laying in the toilet for the project.The study formulates the implementation rules for the construction of wall and floor buried pipe laying and decorative surface tiles.The wall floor pipeline,sanitary ware equipment center,and the wall floor decorative stone center,joint center is correspond one by one.The study summarizes the construction method of buried pipeline for water supply and drainage.It meets the needs of site construction,and carries on the whole line construction promotion,solves the problem of rework caused by traditional construction errors,and improves the construction quality.This construction method has been widely used in the construction of Metro Line 2,and has achieved good results.