In this paper,a numerical computing model for the reinforcement of cataclastic rock mass is established by the use of ANSYS program.The orthogonal analysis on the influencing factors of the displacement of surrounding of roadway is carried out.The influent rules of every factor on the displacement of surrounding of roadway are drawn out.A group of multivariate linear regression equations for the influencing factors are obtained.And the influencing factors are sorted by their influencing degrees.