Abstract: The three commonly used methods, separate method, integral method and combined method can all be used to conduct numerical simulation of reinforced soil and reinforced concrete. The three methods are actually the same in the essence. In this paper, separate method, integral method and combined method are employed respectively to calculate a reinforced soil system and the results are compared. Two cases are considered for the combined method：one is considering the reinforcement being located at 1/3 of the height of the soil element, the other is assuming the reinforcement lying at 2/3 of the height. It is found that the results by different methods differ only in the range near the boundary of the computational domain, which is about two columns of elements. The results are almost the same deeper in the computational domain. The study is thought to be helpful in the application and selection of computational methods for reinforced soil.