Based on the log spiral failure mechanism, this paper establishes a method for calculating the internal force of the reinforced soil structure under the limit equilibrium state. The internal force is calculated layer by layer, and the front and rear end of the reinforcement check calculation and the composite failure mode are considered. Taking the maximum tensile value and position of each layer of reinforcement and the required connection strength of the panel as the main reinforcement properties of the research index, aiming at the strength of the filling, the height of the structure, the inclination of the wall, the length of the reinforcement, the spacing of the reinforcement, and the friction coefficient of the interface between the reinforcement and the soil.