While applied to improve the slope stability，layout of DCM (deep cement mixing) is directly related to the rationality of the structure，which in turn affects stability and safety of the slope.As for current engineering practice，it is noted that there is still a certain misunderstanding of the stress mechanism on condition that different DCM layouts are adopted to improve slope stability.Based on 3D finite element method and combined with different layout patterns of DCM (in columns，latitude walls，longitude walls and grids)，overall stability，displacement and stress of the reinforced slope are analyzed.Displacement and stress distribution laws of the reinforced slope with different DCM layouts are studied.The research shows that DCM in longitude walls and grids are significantly improving the overall stability safety factor of the slope，reducing the DCM displacement and stress and making their distributions more reasonable compared with DCM arranged in columns.Of all the comparing layout patterns，DCM in longitude walls has the greatest advantages.