Abstract: Agricultural research informatization plays an important role in agricultural scientific innovation. Evaluation of informatization level helps push forward the construction of China’s agricultural research informatization. This paper aims to evaluate the informatization level of the institutions in CAAS based on the survey data and study the related factors that affect the informatization level of agricultural research. The study constructed an evaluation index system for agricultural research informatization level from informatization application, informatization infrastructure, informatization team, informatization input and informatization environment and measured the informatization level of institutions in CAAS with principal component analysis. And what is more, it analyzed the correlation of informatization level and its influence factors with the multiple linear regression models. There are three institutes which informatization level is more than 1.5 point and the gap of informatization level between different institutes is large. Funds and scale of the institutes are relevant to the informatization level. Institutes with adequate capital and large scale will have a higher informatization level. Informatization construction of agricultural research is urgent and needs to be uniformly planned, deployed and coordinated; informatization construction of agricultural research is still in the primary stage, there are still many problems; more input to informatization construction of agricultural research can improve the informatization level of agricultural research.