This paper discusses the interaction between theories and facts in modern Chinese grammar study.The paper is made up of four parts.Part Ⅰ,theories and facts in Chinese grammar.Part Ⅱ,historical footsteps,from Ma Jianzhong to Zhu Dexi.Part Ⅲ,some thoughts on Chinese grammar research in the future.Part Ⅳ,conclusion.Through the discussion the paper hoLds that the interaction between theories and facts is the only way leading to the maturity of modern Chinese linguistic research and it will also lead to a pragmatic and creative phase...