Abstract: Research on the coordinated development of urban power grid and subway electromechanical system from the perspective of intelligent construction TAN Xiaobing (China Railway 12th Bureau Group Electrification Engineering Co.,Ltd.,Fuzhou 350007,China) As an important means of transportation in modern cities,subway plays an increasingly important role.As the core part of subway operation,the energy efficiency optimization of subway electromechanical system has become a hot topic of current research.Urban power grid plays a key role in improving the energy efficiency of subway electromechanical system and reducing energy consumption.From the perspective of intelligent construction,this paper discusses the coordinated development of subway electromechanical system and urban power grid.The energy efficiency status and challenges of subway electromechanical system are analyzed,and the energy efficiency optimization strategy based on feedback control,load regulation and energy feedback technology is proposed.By introducing advanced intelligent control system and optimization algorithm,the energy consumption of subway electromechanical system has been effectively controlled and managed,and the operation efficiency has been improved.Finally,this paper verifies the effectiveness of the optimization strategy through actual case