This study is to fill the blanks of comprehensive review of text readability in China so as to offer references both to scholars who are dedicated themselves to these areas and to learners and practitioners who are still struggling with readability. In order to do that, affecting factors, measurements, and previous studies and further trends constitute this research. We found that the measurements of readability largely limit to lexis and syntax factors. Besides, studies of readability have been stagnant on its measurement and influencing factors. Thus, on the one hand, we encourage scholars to further update readability formula which takes reader factors, setting and genres into consideration. On the other hand, studies on the relationship between readability and lexical richness, online learning environment, teachers' and peers' support deserve our attention.