The rubber removal process controlling knowledge base is constituted based on the mixing mathematic model knowledge. The target of the knowledge base is to inhibit and compensate quality fluctuation caused by material, environment, man factor, etc., optimize rubber mixing process, and provide production monitoring and deciding support. The constitution of the mixing mathematic model includes tracing rubber removal to construct model and compensating rubber removal to construct model. The rubber removal process controlling knowledge base of the present invention includes event library, regulation library and contradiction result library, and the event library consists of reason library, result library and intermediate library for saving all the definition content. One trigger is set in SQL Server for saving all the above said logic relations.