Abstract: Aiming at the problem of severe deformation of 500 main roadway in Caocun Coal Mine influenced by dynamic pressure, the key factors of soft rock roadway damage were analyzed and the deformation mechanism was studied with the methods of theoretical analysis, numerical simulation and field measurement. The results show that the dynamic pressure can break the balance of the original stress and increase the main stress in the surrounding rock, resulting in the imbalance of rock strength & stress in elastic-plastic boundary. The transfer of the boundary to the deep lead to the increase of the rock failure scope and the weakening of the bearing capacity. The control concept and strengthening plan of surrounding rock under dynamic pressure were put forward. Pressure observation shows that the amount and speed of surrounding rock deformation decrease significantly, and the roadway deformation during dynamic pressure is obviously controlled.