Objective: Study the actual dosage of clinical prescription in pediatrics of traditional Chinese medicine(TCM) based on the data from two affiliated hospital of Guiyang college of TCM

and clear the situation and characteristics of the dosage of Chinese cut crude drug in Guiyang city. Method: The paper made use of the methods of stratified sampling and random sampling to investigate 1 832 broth prescriptions of pediatrics of TCM

and constructed the database

then applied Weka software to analyze. Result: It was identified the frequency and clinical dosage intervals of 300 drugs

and the practical dosage which dose has difference between in the actuality and in the pharmacopoeia. Most of drug’s dosage centralized the four intervals: (3-6]g

(6-9]g

(9-12]g

(12-15]g

and the concrete dosage were 6

9

10

12

15 g

etc. Conclusion: The situation and characteristics of the dosages of clinical prescription in Guiyang city are coincided with the national level in pediatrics of TCM.