Based on serious coal wall spalling, extremely broken roof and difficult controlling flow of coal and ballast occurred in stoping process of 14259 light sublevel caving face in Xintun Mine, which was an island mining face and affected by surrounding goaf, technology of coal wall strengthened with cement grouting was applied to promote working face smoothly and achieve better application results. It made a difference in coal wall reinforcement of island mining face under similar geological conditions and had a strong promotional value.