According to characteristics of easy pasting tool clay in Tianjin port,this paper points out that the key indicators for adhesive forces of easy pasting tool clay are its moisture content,plasticity index and cohesion.Based on a lot of indoor soil geotechnical test data about easy pasting tool clay,this paper studies and analyzes the relationship between adhesion and key indicators including moisture content,plasticity index and cohesion by the mathematical statistic method.The results show that:1)the regression coefficients of empirical formula of adhesive, moisture content and plasticity index are above 0.8,which means high reliability;2)adhesive force of clay is about 3 times of its plasticity index under natural condition in Tianjin port.Aiming at the case of cohesive soil dredging construction and through the comparison of the adhesion and its key indicators,the paper conclude that it is possible for cohesive soil to paste tool under this condition.