Research conclusions: (1)The analysis of wind pressure calculation of the EMU shows when the midway between tracks is 4.4m, the erecting equipment is in the stationary state and the speed of the EMU is at 165 km/h, the maximum amplitude of pressure fluctuation generated by the EMUs meeting is 637. 15 Pa and it is less than the allowable instantaneous pressure wave value of 900 Pa of the midway between tracks. The EMU's window structure and glass are in the safe and reliable state and the equipment has the high stability. (2)By adopting the method of blocking track for 5 hours to erect 1 beam or laying 300m long track panel, the laying and erecting works can be done in small midway between track of 4.4-6.5 m from the existing railway track. In this way, the construction safety and quality are guaranteed, the construction cost is cut and the construction period is shortened. (3)This research result can provide the reference to both small railway line spacing range of additional second-line construction technology.