Among the many structures of foundation pit, the pile-anchor support structure has the characteristics of high safety, low cost, not occupying the space of foundation pit and convenient construction, and is widely used in foundation pit engineering. This study constructs an advanced parametric model of the pit structure and carries out the secondary development of the monitoring data visualization plug-in in the Revit software environment to realize the visualization function of the pit structure data. Subsequently, based on the deformation mechanism of the pit structure, after selecting a suitable land principal model, the pit model was successfully imported into ABAQUS for 3D finite element simulation analysis, and the effect of the simulation was optimized based on orthogonal experiments. The optimization results show that the optimal scheme is 0.60m diameter of row piles, 1.5m spacing of row piles, 200kN prestressing force of anchor rods, 15° inclination of anchor rods, and the length of anchor rods are (19m, 21m, 17m). Compared to the original design scheme, the optimized pit structure scheme reduces pit deformation and reduces project cost, which achieves good economic benefits and achieves the purpose of the optimized design.