Under the epidemic situation, it is more and more important to improve college students' information literacy.In this paper, we are the first to propose an information literacy improvement model for college students based on smart learning environment. On the basis of previous studies and literature analysis, we describe the elements of the smart learning environment for the cultivation of college students' information literacy.These elements, which we summarize as CIAP, consist of four aspects: conceptual level, intelligent level , action level and process level.Based on CIAP,we propose a new blended learning model to improve college students' information literacy sustainably. The first is to expand learning resources by special topics; The second is to create a learning environment intelligently; The third is to clarify the interactive learning activities; The fourth is the innovative mutual learning process; The fifth is the timely verification of learning feedback; The sixth is the multiple optimization of learning evaluation.We have carried out targeted experiments to test the validity of the blended mode.Through the concrete empirical study of college students majoring in engineering technology in Chinese university, it is concluded that there is a statistically significant difference between the post-test data of the experimental class and the control class.The results prove that the blended learning based on smart learning environment proposed in this paper has a significant effect on the cultivation of information literacy of college students.This paper discusses the spiral development of information literacy enabled by the smart learning environment. Our work involving studies of the thinking and direction of the sustainable development of information literacy training proved to be encouraging.