Abstract: Taking Hefei Metro Line 1 as an example, this article first elaborates the characteristics of subway electromechanical equipment installation in terms of complexity, intelligence and high performance, and then analyzes the deviation of subway electromechanical equipment installation from the aspects of design, construction, communication, and audit. The reasons for the emergence are analyzed from the main structure, leakage, fire safety and aesthetics, and the hazards of the installation deviation of the subway electromechanical equipment are analyzed. Finally, the measures to prevent the installation deviation of the subway electromechanical equipment are explained from the aspects of design, acceptance, site management, and quality management. In order to provide a reference for the installation of similar equipment.