Abstract: Objective: The Jigongju Tunnel in Chongqing City is a super shallow\|buried overlying tunnel, with the upper layer being reserved as a high\|speed rail tunnel and the lower layer being a railway tunnel. It is necessary to compare the stress characteristics and deformation features of the tunnel surrounding rock under different construction sequences, and analyze the structural disturbance effect between tunnels in order to obtain a reasonable excavation sequence for construction. Method: The engineering background, engineering geology, and hydrogeology of the Jigongju Tunnel are briefly described. Two construction schemes are proposed according to the order of tunneling (Scheme 1: upper tunnel construction followed by lower tunnel construction; Scheme 2: lower tunnel construction followed by upper tunnel construction). A 2D finite element model of the tunnel is established to calculate and simulate the stress characteristics and displacement distribution of the strata and structures during excavation. The calculation results of the tunnel surrounding rock deformation indicators under the two schemes (including vertical settlement, horizontal displacement, and shear stress) are analyzed and compared with the actual monitoring data to evaluate the reliability of the simulation calculations. Result &Conclusion: The simulation results are found to be in good agreement with the actual monitoring data. Compared with Scheme 1, Scheme 2 is more favorable for improving the structural bearing capacity of the tunnel, controlling the range of plastic deformation, and reducing the risks of support structure instability and failure.