Retaining walls are such important structures in the field of civil engineering, that it is necessary to conduct a comprehensive evaluation of their performance and stability. One of the most important aspects of designing retaining walls is the function that numerical analysis plays, which is a crucial component. Engineers are provided with essential insights into the behavior of structures, the performance of materials, and overall stability via the use of this technology, which has a significant impact on the development of retaining walls that are both robust and secure. The GEO-5 program is used in this research to carry out a full parametric assessment to analyze the retaining wall. The primary emphasis of this investigation is on the vital significance that numerical analysis plays. The purpose of the study is to evaluate the effectiveness of the software by first comparing California Bearing Ratio (CBR) values with Finite Element Method (FEM) models in GEO-5 and Plaxis 2D, in addition to conducting laboratory tests, which is part of the research project. This inquiry makes use of the GEO-5 FEM finite element software to construct an accurate numerical model of a laboratory-scaled retaining wall. This is accomplished by performing simulations with great care under a variety of situations, such as static and dynamic. The results are used to guide the selection of instruments, demonstrating the applicability and accuracy of the procedure in the laboratory test setting for retaining walls.