Abstract: To reveal the law of deformation and failure of the surrounding rock of deep mining entrys with retained bottom coal and put forward an effective support strategy, taking the headgate of No.020202 working face of Qingyun Coal Mine as the research object, a mechanical model of deep roadway was established, and a dimensionless sensitivity factor was introduced to reveal influences of buried depth, surrounding rock strength, mining stress and support resistance on the deformation and failure of the surrounding rock. Based on this, a novel support strategy was proposed and verified by a numerical simulation and field measurement. The results show that the order of influencing factors of the surface displacement and plastic zone radius of the surrounding rock is as follows: buried depth > surrounding rock strength > mining stress > support resistance. The proposed support strategy of "removing bottom coal and grouting reinforcement + high prestressed strong rockbolt and anchor cable timely support" can effectively suppress the development of the plastic zone, reduce the deformation of the surrounding rock by more than 50% and no need to repair. This research can provide reference for support design of deep roadways with retained bottom coal.