Abstract: With the continuous development of my country's newly built high-speed railways and the speedup of existing railways, a large number of bridge construction projects across railways are increasing. The construction of crossover bridges and turning technology on existing railway lines is the most effective solution to reduce the impact on existing railway lines. Based on this, this article combines the construction case of the crossover pedestrian bridge over the operation line of Xiangyu Line within the Chengdu Bureau Group Corporation to discuss the technology for reference.