Abstract: In order to study the stability and reasonable support measures of surrounding rock in roadway excavation near a fault, the return roadway of Anli Coal Mine was taken as the engineering background. The stress field, deformation field, seepage field, plastic zone of surrounding rock around FD49 fault fracture zone were systematically analyzed by FLAC3D. Based on this, the influence of bolt spacing and grouting reinforcement range on the deformation and failure characteristics of roadway surrounding rock was studied. The results show that: when the roadway surrounding rock near a fault is harder, the precursor characteristics of water inrush deformation near the fracture zone of water-rich fault are less obvious. Therefore, it is necessary to perform hydrophobic depressurization treatment on the fault fracture zone with a certain thickness of anti-outburst in advance. After the roadway excavation exposes the fault fracture zone, the surrounding rock of fault fracture zone should be reinforced with grouting and bolt-blasting support. Among them, the range of grouting reinforcement should be 3 to 5 m, and the length and interval of bolts can be selected to be 2.4 m and 0.8 m.