The surrounding rock roadway of Zhonglin Coal Mine against south wing downward is soft and fractured. Affected by faults, the roadway deformation capacity is big, the kick drum is serious, and repair rate is high. In order to reduce the maintenance costs and the frequency of maintenance, this paper, by using the roadway surface displacement, the rock loose circle range of observations, and by using the numerical simulation software COMSOL, analyzes the surrounding rock deformation reasons, optimizes roadway materials and shapes, and makes the U-shaped curved section of the support method. Using optimized support design in the field can make a good supporting effect, which provides references for similar mines.