In order to analyze the stability of the surrounding rock of the roadway in the igneous intrusion section of gob-side entry excavation, the deformation of the roadway in the non-intrusion and intrusion sections was measured on site. It was found that the deformation of the surrounding rock in the intrusion section of the roadway was significantly greater than that in the non-intrusion section, with a maximum deformation exceeding 500 mm, which seriously affected the integrity of the roadway section. Analysis suggested that the intrusion of igneous rocks led to a decrease in the integrity and strength of coal pillars, resulting in a significant increase in deformation of the roadway. At the same time, numerical simulation results showed that the deformation of the surrounding rock of the roadway was mainly concentrated on the side of the coal pillar, indicating the direction for optimizing roadway support. Propose to use the "grouting reinforcement+single pillar" method on the basis of the original support method to improve the integrity and strength of the roof, floor, and roadway walls. The on-site application results showed that after adopting the "grouting reinforcement+single pillar" strengthening support method, the maximum deformation of the roadway roof and floor was 80 mm, and the maximum deformation of the two sides was 75 mm. The deformation of the roadway surrounding rock was significantly reduced, effectively ensuring the stability of the roadway surrounding rock.