Abstract: Objective: Double\|top tube tunnels crossing uneven soft and hard strata often lead to a series of problems such as deformation of surrounding strata and damage to pipe segments. In order to prevent these problems from occurring frequently, it is necessary to carry out in\|depth investigation into the softness and hardness of strata as well as the effect of different construction sequences on the surrounding strata and pipe segments. Method: Based on the drainage channel pipe jacking project of Pinghua River in Nanning City, a three\|dimensional finite element tunnel excavation model is established using numerical simulation methods. Five different working conditions are selected based on the proportion of clay area r1 in the tunnel cross\|section under two excavation sequences: synchronous excavation of the left and right lines, and excavation of the left line first and then the right line.The deformation of the surrounding soil and the stress of the pipe segments during the double culvert crossing through different soft and hard soil combinations are analyzed. Result & Conclusion: The ground settlement caused by the double jacking pipe crossing various soft\|hard strata is significantly different, which increases with the increase of r1, and the maximum of the entire cross\|section clay layer under synchronous excavation is about 2.2 times that of the entire cross\|section limestone. The ground settlement caused by the excavation of the double jacking pipe in sequence is about 1.1 times that of the synchronous excavation of the left and right lines. When the tunnel jacking machine excavates forward 2 times the diameter distance of the tunnel at the monitoring section, the ground surface settlement does not change significantly. The maximum Mises stress of the pipe increases with the increase of r1.