The Comprehensive Language Knowledge Base (CLKB) was built by Peking University Institute of Computational Linguistics since 1986. CLKB includes 6 language knowledge base, 10 specifications and standards, basic software tools and four application systems, which support each other to form an organic whole. CLKB series of language knowledge covers words, phrases, sentences, chapters of the various units and lexical, syntactic, semantic aspects, from Chinese to multi-language radiation, from the general field into the professional field.