To investigate the shell morphological traits closely related to the meat yield rate of Bellamya purificata，180 individuals of varying sizes，large （≥5 g），medium （3-5 g），and small （1-3 g） were randomly collected for study.After weighing，the parameters： shell height （X₁），body whorl height （X₂），spiral whorl height （X₃），shell width （X₄） and shell aperture height （X₅） were measured.The abdominal foot muscle was then dissected to determine the net meat weight，and meat yield rate （Y）.Then，correlation analysis，path analysis，and stepwise regression analysis were conducted to identify the key shell morphological traits associated with the meat yield rate.Multiple regression equations were established based on the results obtained.The results showed that，the meat yield rates of three sizes of B. purificata were significantly correlated with all five shell morphological traits （P<0.01）.Among these traits，shell width exhibited the highest correlation with meat yield rate，with correlation coefficients of 0.812，0.811，and 0.850 for large，medium，and small individuals，respectively.Path analysis results revealed that shell width，shell height，body whorl height，and spiral whorl height were significantly related to meat yield rate.Notably，shell width displayed the highest correlation with meat yield rate，with path coefficients of 0.534，0.705，and 0.850 for the three size categories.The regression equations for shell morphological traits （X_i） and meat yield （Y） were fitted by stepwise regression analysis as Y=-0.275+0.013X₄+0.010X₂-0.003X₃，Y=-0.112+0.014X₄-0.003X₁+0.005X₂ and Y=-0.078+0.019X₄ for large，medium and small size individuals，respectively.The results of this study indicated that shell width is the morphological trait most closely related to meat yield rate，and therefore it can be used as an indirect selection trait for the genetic improvement of meat yield in B. purificata.