To analyze the clinic application of Maixuekang Capsules in the treatment of breast tumors in the real world and explore its potential therapeutic methods, in order to improve the clinical rational drug use and provide reference. Methods:Frequency statistics and association rules were used to analyze the clinical drug use information of Maixuekang Capsule for treating 416 breast tumor patients in the database of hospital information system from 7 Grade 3A general hospital information system. Results:Among the patients treated with Maixuekang Capsules, women were more than men. The age was mainly distributed between 18 and 44 years old, showing a younger trend. The average course of treatment was (6.63±5.56) days. Maixuekang Capsule was often used in combination with antiviral drugs, antibiotics, procoagulant, vasoactive agents and antitumor adjuvant in Western medicine, as well as Chinese medicine with the function of softening hard lumps and dispelling nodes. The effective rate of total return at discharge was 50.24%. Conclusion:Based on the current data, it is found that Maixuekang Capsules has certain characteristics of the population and clear clinical characteristics and to a certain extent, the study can provide reference evidence and reference for the rational treatment of breast cancer patients with Maixuekang Capsule.