Abstract: As viewed from man's cognition behavior,the authors explore Chinese syntax analysis method.As far as the syntax analysis is concerned,the system structure of expert system is adopted to build a Chinese syntax analysis system based on knowledge,the core of which is the knowledge base to store and manage syntax knowledge and the ratiocinater which possesses of the intelligent behavior of language experts and the capacity of syntax analysis.This system adopts product rule for knowledge expression and the inference strategies is carried out from several respects,including top-down,left-right,depth-first,trace control and so on,and tentatively explores the semantic analysis.Otherwise,the operation examples of the system are also presented for reference.