Abstract: From the perspective of urban rail transit construction, the electromagnetic compatibility issue of electromechanical core system during construction phase is sorted and summarized. From aspects including electromagnetic environmental impact, electromechanical core system, key equipment room evaluation, frequency band interference, the electromagnetic compatibility standard adopted during bid and proposal phase is expounded. Targeting the project implementation phase, a management group is suggested to establish, proposing advice on completing electromagnetic compatibility management, from aspects including management plan, hazards and risk analysis report, test plan and test report.