Abstract: In order to study the stress distribution law of different depths in the axial direction of the roadway during the tunneling process of the trapezoidal-section excavation roadway, FLAC^3D software is used to simulate the roadway tunneling process.Based on the fractional-order theory, the fractional-order creep model is established, and the secondary construction is completed in FLAC^3D software.By assigning different creep models to different rock layers, simulating the stress distribution of rock layers with different lithology, analyzing the stress distribution at different locations in the axial direction of the roadway, and simulating the influential factors of the stress distribution in different conditions, it is concluded that the deformation of the roof of the roadway is a dynamic process in space and time, and the roof and floor rock stresses in the support zone, hollow roof zone, disturbed zone, and original rock zone are all in the process of dynamic evolving change, and the stability of the roof is different under different conditions.