To improve the quality and efficiency of the mesh in the finite element model of the knee joint by using the cell-based smoothed finite element method（CS-FEM）.

The gradient smoothing technique is introduced on the basis of the traditional finite element method, and CS-FEM is used to mesh the finite element model of the knee joint, and to compare which of the two methods（traditional finite element method and CS-FEM）is more accurate for the experimental data of the previous study.

CS-FEM is more accurate and reduces the complexity of meshing than the traditional finite element method, and reduces the number of cells, making the solution process more efficient.

The conventional FEM methods offer high computational accuracy and stability when dealing with relatively simple geometries and linear materials due to their wide application and maturity. However, in biomechanical simulation of complex structures and nonlinear materials, CS-FEM provides higher computational efficiency and accuracy by optimizing meshing and reducing stress concentration. Therefore, CS-FEM is expected to be more widely used in the modelling of knee joints and other complex bio-logical structures in the future.