According to the properties of production scheduling problems and applying the theories of knowledge representation in artificial intelligence as well as knowledge engineering，this paper focuses onproblem—oriented representation for symbolic knowled ge (such as flow—chart of technology，structuralchart of the production．etc．)in computer．identification for actual problems，information proc essing together with expanding，and presents a knowled gebased tree-like representation for actual problems of production scheduling，in order to improve the adaptability of dynamic environment for production scheduling and its software systems．A knowledge representation support system for production scheduling problems has been set up．It is very beneficial for this research to set up a manufacturing planning and scheduling system faced with dynami c environment，deepe n researches in real—time control and scheduling of manufaeturing process．