Abstract: This paper Based on designed reinforced soil retaining wall model,combined with the analysis of previous studies,through the derivation of the formulas,the earth pressure,the pseudo-cohesion,the pseudo-friction angle and the destruction forms of the reinforced soil retaining wall were studied.According to the summary,the forms of the failure mode of reinforced earth retaining wall can be divided as friction failure and pull off failure.Derived results showed that:for the different failure forms,the changes of the friction and the cohesions were different,especially for the pull off failure,the changel of the likely cohesion followed by the vertical layer spacing of the reinforcement was obvious.And it was more easier to happen the pull off failure when the filling heights were the same.