0ver the years.it has become the foCUS of the Chinese government and bank regulators to improve the economic efficiency of commercial banks.and it has always been the heart to solve China'S financial problems. The article discusses the concept of economic eficiency, and further points out the meaning of economic efficiency of commercial banks。and then establishes economic evaluation index system of commercial banks.which derives the evaluation results of economic eficiency of commercial banks by applying principal component analysis model and gives corresponding analysis