Abstract: Objective: To explore the preventive effects of new chest belt on subcutaneous effusion of breast cancer after operation.Methods: One hundred and seventeen breast cancer patients treated with radical resection were randomly divided into observation group(61 cases) and control group(56 cases).The incisions of the observation group and control group were banded using new chest belt and multiple chest belt,respectively.Under the condition of high and low tension flap,the subcutaneous effusion between two groups were compared.Results: Under the condition of low tension flap,the subcutaneous effusion rate of observation group was lower than that of control group(P<0.05).Under the condition of high tension flap,there was not significant difference in the subcutaneous effusion rate between two groups(P>0.05).Conclusions: New chest belt can effectively reduce the subcutaneous effusion rate of breast cancer with low tension flap after operation.The prevention effect of subcutaneous effusion in patients with high tension flap need to improve.