OBJECTIVE: To explore an evaluation method for prescriptions of traditional Chinese medicine（TCM）decoction pieces in accordance with the clinical practice. METHODS: Data in Beijing prescription review platform from Nov. 2017 to Oct. 2018（51 medical institutions in Beijing report all prescriptions of TCM decoction pieces in outpatient in 1 week every month） were acquired

1 527 261 prescriptions of TCM decoction pieces were involved after screening. Set an evaluation indicator that can objectively evaluate the quality of prescriptions from a macroperspective

so as to quantify the prescriptions in medical institutions in Beijing from a macroscopic aspect

and conduct summarization and analysis of big data. RESULTS: The application indicator of TCM decoction pieces in 51 medical institutions in Beijing was in a stable condition

with the average use intensity was 16. 72（± 4. 78%）

the average dose deviation index was 1. 25（± 4. 52%）

the average medicine cost of each dose was 51. 66（± 6. 44%）yuan

the average category of TCM was 13. 94（±1. 89%）

the average number of doses was 8. 53（±1. 84%）; as an evaluation indicator

the use intensity was in a stable trend

while the average medicine cost of each dose fluctuated from month to month; the correlation between use intensity

dose deviation index

average medicine cost of each dose and hospitals grades was small

so that the monitoring standards can be formulated uniformly; the average number of doses and the average category of TCM need to be restrict according to hospital grade and types; the use intensity was more relevant to different clinical departments and diseases. The quality indicator of prescriptions of TCM decoction pieces was in line with the characteristics of prescriptions in medical institutions at macroscopic aspects

which can objectively reflect the clinical drug application and can be used as the basis for macroscopic monitoring of prescriptions of TCM decoction pieces. CONCLUSIONS: The macroscopic quality indicator for prescription of TCM decoction pieces has positive significance for ensuring the quality of TCM decoction prescriptions

effectively controlling irrational increase of its cost

improving the awareness and standardization of rational medication in clinic and promoting the rational application of TCM decoction pieces.