In order to analyze the seismic earth pressure of cohesive soil retaining wall, the general method and simplified method for calculating seismic earth pressure are established through Rankine earth pressure theory and Coulomb earth pressure theory and two existing earth pressure calculation theories. These two methods are used to calculate the distribution of seismic earth pressure, the height of action point and the fracture angle, respectively, when considering the surface cracks of filling soil and without considering cracks. The two methods are analyzed and compared, and the following conclusions are drawn: Using simplified method, the "internal structural pressure" is added around the retaining wall, assuming that the cohesion between the filling and the wall drawing is the same, the cohesive soil can be transformed into cohesionless soil for analysis; In general, cracks will occur at the bottom of the wall, that is, the 0-point position of the earth pressure intensity is a distance from the heel of the wall. The distribution patterns of seismic earth pressure intensity calculated by the two methods are quite different, but the overturning moment at the bottom of the wall is relatively small.

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