Abstract: We analyzed 5 economic traits including 3 morphological traits (shell length, shell height and shell width) and 2 weight traits (body weight and edible-part weight) of 80 randomly selected wild Trachycardium flavum by path analysis and multiple regression analysis.Results show that the phenotype correlation coefficients among the 5 measured traits reach very significant level (P < 0.01).Shell length, shell height, shell width and edible-part weight have indirect effects on body weight but through mainly edible-part weight (0.704 8).With shell height excluded for its insignificant partial regression coefficient, we obtained the best multiple regression equation between body weight and shell length, shell width and edible-part weight.Among the morphological traits, shell width affects edible-part weight most with the direct correlation coefficient of 0.409 3.Shell length has indirect effect on edible-part weight through mainly shell width.Finally, we established the multiple regression equation between edible-part weight and shell length and shell weight with shell height excluded.The research provides theoretical basis for the germplasm resource protection and selective breeding of T.flavum.