The invention discloses an impact-resisting tendency roadway support device with deforming and buffering functions and relates to the field of mining equipment. Inner support plates with better elastic performance are arranged on the inner side of an outer support side plate and the inner side of an outer support top plate, in this way, when being impacted, the inner support plates can achieve buffering deformation, and thus the problem that due to rigid connection, a support is damaged is prevented. A buffering gap is formed in the connecting portion between the outer support side plate and the outer support top plate, the buffering gap can meet certain buffering deformation, the support performance is ensured, buffering mechanisms are contained and arranged in the buffering gap, impact force can be buffered and corrected, and the support ability is ensured. The buffering mechanisms achieve transverse and vertical buffering, buffering support efficiency in the different directions isachieved, meanwhile, the transverse buffering mechanism and the vertical buffering mechanism can carry out buffering in the different directions, fine adjustment control of a space angle is achieved,and the support effect is ensured.