Based on the 2^# pipe jacking project in the south line of Shiyan, Shenzhen, the construction influence and reinforcement scheme of super-large diameter double circular pipe jacking side-crossing dense building areas were studied by adopting Midas-GTS/NX finite element software and field monitoring data. The results show that the influence of pipe jacking construction on the displacement of the front pile is greater than that of the back pile, and the longitudinal displacement of the pile (the displacement along the excavation direction of pipe jacking) is most affected in the range of two times the diameter of the central axis of pipe jacking and 1.5 times the diameter of the buried depth of the pile, showing U-shaped distribution. The lateral displacement of the affected pile (horizontal displacement perpendicular to the direction of pipe jacking excavation) presents S-shaped distribution when the excavation is completed on the left and right lines. The lateral displacement of the pile in the deeper stratum is larger than that in the shallow stratum, and the extreme displacement occurs in the section where the pipe is excavated. The vertical displacement of the pile (the direction of the pile axis) is negative, and the closer distance to pipe jacking leads to greater influence, with the settlement value of the pile top smaller than that of the pile end. Without reinforcement measures, the maximum lateral horizontal displacement of the pile is 9.41 mm, which meets the requirements, but the maximum longitudinal horizontal displacement is 14.76 mm and the maximum vertical settlement is 13.03 mm, both of which are beyond the allowable value range. After taking the sleeve valve pipe grouting reinforcement measures, the maximum longitudinal displacement of the pile is 8.98 mm, the maximum lateral displacement is 5.64 mm, and the maximum vertical displacement is 8.86 mm, all of which meet the control requirements. The reinforcement achieves a remarkable effect, enabling the smooth side crossing of super-large diameter double circular pipes beneath the dense building areas.