Based on the low strength of soft coal seam working face of coal wall and weak bearing capacity, with rib spalling easily happening in working face recovery, 5102 working face of Shanxi Xinfei Energy Investment Group Corporation Ltd. was taken as the example, coal seam water injection was used to prevent rib spalling, the experiment result showed that the measure implementation could effectively control rib spalling problem, meanwhile, improve the working face environment, lay a foundation for improving the safety and mining speed of the working face.