Douglas Biber and Randi Reppen’s The Cambridge Handbook of English Corpus Linguistics surveys the breadth of corpus-based linguistic research on English and presents a critical discussion of the state of the art in each subdiscipline of corpus linguistics. It is of great value and guiding significance for corpus linguistics research. This paper gives a brief review of the book and its main characteristics such as a comprehensive summary, valuable guidance and critical discussion, as well as its detailed description of case studies and analysis of potential limitations and future directions in each area. Based on this book, there are good reasons for us to believe that corpus-based research on gradience might become another theoretical innovation of corpus linguistics in the field of language study. Furthermore, with constant theoretical innovations, the status of corpus linguistics as a subdiscipline of linguistics will become increasingly independent.