Abstract: To address the problems of high stress, large deformation and difficult control of extremely narrow coal pillar roadway in extra-thick caving coal, through theoretical analysis and numerical research methods, this paper analyzes the relationship between the support force of extremely narrow coal pillar and the length and angle of roof cutting, compares and analyzes the stress distribution characteristics and deformation evolution law of roof and coal pillar in extremely narrow coal pillar roadway with different roof cutting schemes, and puts forward the coordinated control technology of surrounding rock in extremely narrow coal pillar roadway with extra-thick caving coal. The research shows that after the roof cutting and pressure relief of the gob-side roadway in the extra-thick fully mechanized caving face, the support force of the extremely narrow coal pillar gradually decreases with the increase of the length and inclination angle of the roof cutting, and the decrease amplitude gradually increases. By increasing the length and angle of roof cutting, the vertical stress and vertical intersection point of surrounding rock at different floor heights in coal pillar are transferred to the direction of roadway, which is beneficial to the stability management and control of coal pillar. After the field application, the maximum displacement of the extremely narrow coal pillar roadway is only 269.03 mm, the maximum displacement of the surrounding rock on the coal pillar side and the solid coal side is 220.18 mm and 195.36 mm respectively, and the minimum displacement of the roadway floor is 92.83 mm. The deformation of the surrounding rock has been effectively controlled, the cross-sectional area has been guaranteed, and the roadway forming can meet the use demand, and the effect is remarkable.