Objective To explore the application value of ultrasonic classification of plasma cell mastitis （PCM）in diagnosis and treatment of traditional Chinese medicine （TCM）.Methods A total of 200 PCM patients in our hospital were selected and randomly divided into observation group and control group，with 100 cases in each group.According to ultrasound images，200 PCM patients were divided into five types：catheter dilation type，cyst type，solid mass type，abscess type and sinus fistula type.The observation group received differentiated TCM treatment based on different ultrasound types，and the control group received corresponding TCM treatment refer to the current clinical treatment plan with high cure rate.After four weeks of treatment，the effective rate of treatment and changes in ultrasound examination indexes were compared between the two groups，and followed up the recurrence rate of the two groups of patients.Results The lesions of catheter dilatation type and cyst type in the two groups disappeared after treatment，and the treatment efficiency was 100%.The lesions of sinus fistula type in both groups were less than before treatment，the effective rates of treatment group and control group were 56.10% and 38.64%，and there was no statistically significant difference between the two groups.The lesions of solid mass type and abscess type were reduced to varying degrees after the treatment.The effective rates of treatment in the observation group were 91.30% and 86.67%，while those in the control group were 73.33% and 48.28%.There was a statistically significant difference in the effective rates between the two groups ( P＜0.05).The total effective rates of the observation group and the control group were 81.82% and 62.50%.The observation group's curative effect was better than that of the control group，and the difference was statistically significant（P＜0.05）.The recurrence rate of the observation group was 12%，and the recurrence rate of the control group was 18%.There was no statistically significant difference between the two groups.Conclusion Ultrasound classification of PCM has important value in the diagnosis and treatment of Chinese medicine.