This book systematically discusses the establishment and development of grammar system of teaching Chinese as a foreign language. It makes thorough analysis of the existing problems in this system and puts forward a complete set of new scheme for reforming grammar system in teaching and improving methods of teaching grammar (e.g. the selection and arrangement of grammar items). It also gives detailed analysis of the difficulty in grammar teaching, such as the teaching of separable words. This book is the enlarged and revised edition of the 1994 edition. The author’s latest research results are also included.