In recent years, the global economic structure has undergone profound adjustments, and after China's economy has entered a new normal, transformation and upgrading have always been the theme of my country's economic development. As the backbone of the national economy, small and micro enterprises are inseparable from the support of government policies for their transformation and upgrading. In view of this, this article investigates Wenzhou small and micro enterprises, and focuses on the transformation and upgrading of Wenzhou small and micro enterprises based on the data collected in the questionnaire. On this basis, this paper constructs an evaluation index system for the transformation and upgrading of small and micro enterprises, refines the elements of government behavior, and puts forward corresponding countermeasures and suggestions on the basis of quantitative analysis, in order to promote the transformation and upgrading of private small and micro enterprises in Wenzhou.