To fully explore and utilize the Dongtao chicken(30 roosters and 30 hens),this study collected data of body mass and body measurements of 300-day-old adult Dongtao chickens.Correlation analysis and path analysis were conducted to research the main influencing factor on body mass.The direct and indirect effect sizes of each body measurement on body mass were calculated.The results showed that the body length was the main factor influencing body mass in roosters.Its independent effect,path coefficient and correlation coefficient were 0.533,0.730 and 0.731,respectively.Shank circumference was the main factor influencing body mass in hens and its independent effect,path coefficient and correlation coefficient were 0.176,0.419 and 0.518,respectively.In hens,the breast depth and body length had relatively high indirect effects on body mass,with the cumulative effects being 0.550 and 0.379.