Today the environment protection and preserving the natural dynamics of the coastline is of great importance as a principle, especially the optimal use of its natural resources for the current and future generations. The geosynthetic cellular system is a new idea for designing and building soil cell boxes, using geosynthetics and granular materials. The main function of this system is to protect the beaches and dissipate the energy of waves. The polymer membrane must be used during construction and it should maintain its original shape and do not deform easily under the load, since the deflection can cause local stress in the polymer membrane. Hence, it is necessary to perform stress and deformation analysis on the polymer membrane. The present research, investigates the functions of the geosynthetic cellular system in two steps with the help of ABAQUS finite element software. The mechanical behavior of Firouzkouh sandy soil is introduced with the Mohr-Coulomb model and the polymer membrane and mesh frame with the Ideal Elasto-Plastic model. In the first stage, the analysis of the geosynthetic cellular system has been performed in a quasi-static manner, under vertical loading. For this purpose, three 3D models have been used, with 18 different layouts and each model has 6 layouts. As an example, for the three-dimensional model with a width of 950 mm, a length of 1000 mm, and a height of 950 mm, the results of finite element analysis show that the bearing capacity of the geosynthetic cellular system, in a uniform settlement of 26.62 mm is about 8.48 times more than Matsuoka's analytical method for Soil - Bag system. In addition, the increase in the number of geotextile layers enclosed in the soil has led to an increase in bearing capacity and a decrease in settlement. For example, in the three-dimensional model mentioned with a polypropylene membrane with a thickness of 1.7 mm, the use of a layout (three layers of geotextile - with a distance of 15 cm from the bottom