Abstract: Situation Models Theory is one of the most important theories of contemporary western reading research. This article made a complicated introduction of five dimensions space, time, causation, protagonist and intention in order to be helpful for the whole understanding of the theory. According to the paper, we can know that there are more research results in space, time and protagonist dimensions, and the research paradigm are more mature; the research results are less in time and intention dimensions

Key words: text reading, situation models, space dimension, time dimension, causation dimension, protagonist dimension, intention dimension