Numerous advances in the understanding of the deformation law of deep foundation pit excavation have been accomplished recently. However, there hasn’t been much investigation into how deep displacement laws affect the internal pressures of anchor cables. In order to better understand how deep displacement impacts the internal force of the anchor cable beneath the pile anchoring system of the deep foundation pit, this essay will look into that issue. Using finite element analysis software and the findings of a study of a deep foundation pit project in Jinan City, a two-dimensional model of the deep foundation pit project was produced. In order to replicate the internal force of the anchor cable and the deep soil movement during foundation pit excavation. The findings indicate that there is high agreement between measured values and the numerical simulation results for internal forces and deep soil displacement. In normal situations, the deep displacement of soil caused by excavation causes the internal force of the anchor cable to increase at the start of construction but decrease as work progresses. With the gradual increase of the soil’s deep displacement, the anchor cable’s internal force also increases, and its variation trend is approximately in line with the linear law, which provides theoretical support for the actual engineering construction.