This book is a summary of the results of a “study on the reasoning mechanism of paraconsistent theory”, a project sponsored by the national social science foundation (grant No.: 10BZX054). The project was approved in June 2010, and the concluding result was “a series of papers”. It was concluded in November 2012 and appraised as “excellent”. This bookhas been finished on the basis of a series of papers by further systematically expanding, perfecting and sorting out. In this book, systematic investigation is first carried out on various paraconsistent logic and related studies at home and abroad. The solutions to the reasoning problems of paraconsistent theory are put forward on this basis.