Objective: To Establish comprehensive evaluation model of production process of Qingre Jiedu oral liquid

and apply to production monitoring of this preparation. Method: Qingre Jiedu oral liquid was selected as study object

with shared peaks as multivariate variables

principal component analysis

factor analysis and other methods were adopted to achieve data compression and interpretation

and the overall quality changes of preparations was revealed by a small amount of principle component analysis. Result: Optimum extraction technology of Qingre Jiedu oral liquid was:extracted 2 times with 10 times the amount of water

100 min per time. Conclusion: Dimensionality reduction analysis could simplify analysis process and reveal inherent laws of raw data penetratingly

it was suitable for control of the overall quality of traditional Chinese medicine.