Steep slope roadbed structure and construction method

The invention relates to a steep slope roadbed structure and a construction method. The method comprises the steps that a line position is arranged, a roadbed on the side close to a mountain is excavated, and the excavated roadbed is also used as a construction channel; the slope ratio and the height of the excavated upper slope are set, and the upper slope is protected; setting the height of the retaining wall and the height of a filling slope filled on the retaining wall; determining the structural form of the retaining wall, including an assembly type arch ring retaining wall, an assembly frame type retaining wall or a reinforced soil retaining wall, drawing up a retaining wall construction operation platform and a retaining wall construction excavation line, constructing the retaining wall, filling a filling slope on the retaining wall to a construction channel, and constructing a formed road. According to the invention, systematic treatment measures can be rapidly prepared according to the slope height,