Different from the common scattered and single supplementary reading materials in the market, The Collection of Knowledge of Winning the Championship in Primary Mathematics is a collection, arrangement, supplement and perfection of disciplines carefully collected by many super-senior teachers in their long-term teaching practice. "Knowledge Collection of Winning the Championship in Primary Mathematics" condensed the essence of knowledge in different versions of textbooks and readers all over the country by scientific and effective methods such as sorting out and classifying, and collected the necessary related materials commonly used in and out of class, which was presented in a concise, practical, clear and comprehensive way, so that the majority of primary school students could master the important and difficult knowledge points more firmly and understand them more thoroughly in a short review and examination time. In particular, the book is selected to expand knowledge after class, broaden students' horizons, and link up junior high school learning. It covers a wide range, has a large amount of information, is rich in content, is convenient to consult and has high use value, and is suitable for the learning needs of students at different levels.