The surrounding electromagnetic fields will be changed greatly when the track of medium and low speed maglev is electrified. The generated effect of strong electromagnetic field has a great impact on the safety of the pushing and falling of the steel box girder over the maglev track.Therefore，taking the construction of Changsha Huanghua International Airport Avenue Project as a practical case，the impact of electromagnetic field on the pushing and falling of the steel box girder over the maglev track is studied.The large finite element analysis software ANSOFT is used to perform finite element analysis and numerical calculation on the strong electromagnetic field of the maglev track.It is assumed that the current of the maglev track remains constant during the advancement of the steel box girder. By changing the position of the steel box girder relative to the track，the impact of the strong electromagnetic field generated by the maglev track on the launching and falling of the steel box girder under the different working conditions is studied. After performing the static analysis and calculation for each working condition，the corresponding construction safety scope is obtained. The conclusion of the study provides references and suggestions for similar projects in the future.