Abstract: Through investigation and analysis of the data for several in-situ splitting grout experiments ofeanh dam,the mechanism of slurry consolidation and its affecting factors are discussed. According tothe actual situation of slurry consolidation in the splitting grout of earth dam,this paper puts forwardthat slurring consolidation in the grouting period is a consolidating process under the action of penet-rating force,while that in the elastic rebound period is a consolidating process under the action of later- al pressure in dam body. Mathematical models of slurry consolidation in grouting period and in elasticrebound period are established separately and factors which affect slurry consolidation are analyzed us-ing the method of finite difference.