This research deals with a general professional book which is rarely studied nor analyzed by researchers.It´s AL Koulliat by Abi ALbakáa ALkafawi. It tries tointroduce a comprehensive description of this book.In the beginning, the research speaks about the biography of his writer and tries to know the purpose of its writing, examine its sources and subject, and how to classify and explainit.In addition, the research examines the most important characteristics of the book which is distinguished from other idiomatic books. The research sumsup the most important results and commandments.