[Objective] To establish the comprehensive evaluation model for the slope stability ultimately in loess region along the railways and to evaluate the loess slope stability of the channel DK29 + 860 in Mid-southern Shanxi Province. [Methods] Based on the comprehensive analysis of various influence factors about loess slope along the railway, seven assessment factors were selected. According to the classification criteria of slope stability(stable, less stable, unstable and extremely unstable), the principle of information diffusion was adopted to compare the seven factors with the results calculated by of the FLACR numerical simulation. [Results] The slope was in a steady state evaluated with fuzzy judgment method, the slope stability coefficient was 1.18 with the FLACR numerical simulation software. The two conclusions were basically identical. [Conclusion] Fuzzy evaluation method was reliable, it can evaluate the slope stability accurately in loess region along railways.