The evaluation index system of informatization is the important basis for the measurement and evaluation of small towns. Combined with the national informatization construction scheme, in reference to the information development level measurement and evaluation system of city and agricultural informatization, according to the characteristics of the development of informatization of small towns in China, through the questionnaire survey, expert consultation method and practical test method, mainly from five aspects of the small town of information infrastructure, information resources, the application of information technology, information industry, information talents, information environment to construct the evaluation index system of development level of informatization of small towns, this system is mainly composed of 22 indexes, the weight of each index was determined by using entropy method, and taking Famen town of Baoji city in Shaanxi province as an example to verify the index system. The indicator system can objectively reflect the development informatization level of the local small town.