Abstract:Objective: Study the actual dosage of clinical prescription in surgery of traditional Chinese medicine (TCM), and offer the consummate data for formulating the dosage standard of Chinese cut crude drug. Method: We made use of the methods of stratified sampling and random sampling to investigate 84 759 broth prescriptions of surgery of TCM in 21 various hospitals, 18 provinces, and constructed the database, then applied Weka KDD software to analyze. Result: We identified the frequency and clinical dosage intervals of 300 drugs, and the practical dosage of 155 drugs which dose has difference between in the actuality and in the pharmacopoeia. Most of drug’s dosage centralized the four intervals: (3-6］, (9-12］, (12-15］, (18-21］, and the concrete dosage were 3, 6, 10, 12, 15, 20 g, etc. Conclusion: The dosages in the pharmacopoeia are not coincided with the practical dosages in surgery, and demand to revise. This paper will offer the consummate data for formulating the new dosage standard.