Objective: To observe the effect of medical instant hemostasis gauze combined with filament speed instant gauze on the drainage and flap healing after modified radical mastectomy. Methods: From August 2015 to August 2016, a total of 80 patients with modified radical mastectomy for breast cancer admitted to Huanxing Tumor Hospital, Chaoyang District, Beijing were selected.According to the random number table method, 80 patients who were ready for modified radical mastectomy for breast cancer were randomly divided into study group (40 cases) and control group (40 cases). Two kinds of hemostatic materials (medical hemolytic hemostatic gauze combined with fibril quick hemostatic gauze) were applied to the surgical wounds in the study group during the operation, while no medical hemostatic materials were used in the control group during the operation, and the other treatment was the same as that in the study group.Total drainage volume and drainage tube removal time were compared between the two groups 1 to 5 days after operation. Results: There were no statistically significant differences in the age, body mass index, and effusion production between the two groups (all P>0.05). The total drainage volume of the study group was (289.23±5.36) ml, and the total drainage volume of the control group was (492.15±8.56) ml.The difference between the two groups was statistically significant (t=8.543, P<0.05). The drainage time of the study group was (6.24±1.23) days, and the extraction time of the control group was (10.12±2.21) days.The difference between the two groups was statistically significant (t=6.203, P<0.05). Conclusion In addition to hemostatic function, using absorbable hemostatic gauze combined with surgicel fibrillar during the surgical process can significantly reduce postoperative subcutaneous fluid accumulation.