The construction of the railway line for train operation is difficult and has many restrictive conditions. After the construction is completed, the normal operation of the train must be ensured, and a little carelessness will result in accidents such as delay points, endangering the safety of railway operation, this is especially true for the laying of switches on train tracks. This paper expounds in detail the application of the construction technology of laying turnout on the track of train operation in the southwest ring railway of Taiyuan from the aspects of construction method, personnel organization and so on, thus accumulating experience for the construction of laying turnout on the track of train operation.