According to the consolidation grouting construction for diversion wall in Dongsheng hydropower station, the paper summarizes the principles and precautions of drilling, crack flushing, water pressure test, pulping, grouting and sealing in the process of consolidation grouting. Coagulation and string slurry plugging were taken to deal with slurry leakage and string slurry in the process of grouting construction with good grouting effect.