At present, marketing business knowledge is characterized by large quantity and frequent update, which needs a specialized knowledge base to assist the daily work of front-line operators. An open knowledge forum is established for people to participate in interactive discussion. Firstly, experts regularly initiate the gathering and editing process, solidify excellent questions and answers, and form forum knowledge base; Secondly, a powerful knowledge search engine is built to unified search and display the knowledge forum, 95598 knowledge base, forum knowledge base, and the knowledge in collaborative office system; Lastly, daily operations and incentive mechanism of knowledge base are established for auxiliary management. The application of knowledge base in Zhejiang has got good results.