On the basis of the existing researches，Hill failure mechanism and its slip line solution for the ultimate bearing capacity of flat ground foundation and slope foundation were put forward without considering the foundation soil gravity.The failure mechanism of the strip footings near slope was a continuous variation mode.It should be between failure modes of the flat ground foundation and slope foundation.In the same boundary conditions，the bearing capacity of the slip line solution was a continuous function between the two critical foundation states，as the distance from the top of slope was variable.The bilateral asymmetric Hill failure mode of the strip footing near slope was thus put forward.Then，on the basis of the study，the basal pressure zone was divided into two uniform compressive areas by introducing the width ratio.The stress influence on the slope slider was simplified by using the equivalent free surface.The limit pressure on the slope slide can be then calculated by slip line solution for the slope foundation.The function of the width ratio was set by analyzing the relationship among the width ratio，the distance from the top of slope and failure mode.A new method to determine the ultimate bearing capacity of the strip footing adjacent to slope was then put forward based on the theory of slip line.Finally，the feasibility and rationality of the proposed approach were verified through the comparison with current research results.