The study of punctuation and annotation of Tso chuan not only is useful for the academic commentary system and native literature critical theory but also enlarges the research of Tso chuan to interpret the value of Tso chuan in classicism, historiography and literature. Up till now, however, researchers haven't attached more importance to the works on the punctuation and annotation of Tso chuan. Thus based on the existing documents, the thesis studies the related works from all respects. The thesis includes two books: volume one and volume two.Volume one involves the comprehensive study about the punctuation and annotation of Tso chuan including 5 parts:Part One, according to formation, development, prosperity, lasting and fading period, we described the development course of the punctuation and annotation on Tso chuan, which came into being in Nansong Dynasty and faded away in Minguo period. At the same time , we introduced some works which have their own characteristic. Based on these, the part also analyzes the sprouting, prosperity and decline from the aspect of the Imperial Examination.Part Two includes two sections: Section one is about the factors and the functions of the punctuation and annotation of Tso chuan, especially about some items of Zongping(an comprehensive criticism), Meipi(the criticism on header), Pangpi(the criticism besides the sentence and words), Jiapi(the criticism between sentences) and Weipi(the criticism after an article). In terms of the punctuation, the section briefly introduces several typical usages. Section two gives the general interpretation of the classification on the punctuation and annotation of Tso chuan from the commentary field, the judge fellowship and the contents.Part Three studies the contents and the value of the punctuation and annotation of Tso chuan in respect of classicism. Through the example of Jiang Bingzhang's Du Zuo Bu Yi, the part analyzes the critics how to explain the Classicism, and what meanings they had found by using the methods of punctuation and annotation. By this we can find punctuation and annotation is an useful methods to explain the Classicisms. Most historians on Qing Dynasty thought that the Spring and Autumn researchers on Qian long period seldom reveal the meanings because of the cruel mentality control. Other while, Jiang Bingzhang's Du Zuo Bu Yi expounds Resisting the barbarians and Revenge, which couldn't happen according their opinion. This may help us understand the existing research situation properly. Similarly, Part Four is concerned with the contents and the value of the punctuation and annotation of Tso chuan in respect of historiography, which built on Lv Zuqian's Dong Lai Zuo Shi Bo Yi, Zuo Shi Zhuan Shuo and Zuo Shi Zhuan Xu Shuo. The essay interprets his reading methods, reading aims, in particular, his thought of reading history benefiting virtues, which is the general goal of reading Tso chuan for those who read Tso chuan from history angle.Also, Part Five is still about the contents and the value of the punctuation and annotation of Tso chuan but in respect of literature. Literature critics on Tso chuan usually reveal the meanings from Classicism aspect and comment its historical facts. But they haven't gone so far as some historians and Classicism-man have done, and we will not discuss it besides the brief introduction of the purports of Tso chuan who revealing it from literature way. The part pays much attention to some typical writing rules from the comments on Tso chuan to show its contribution toward Chinese ancient literature criticism.Volume Two aims at the summary of all existing works on the punctuation and annotation of Tso chuan according to formation, development, prosperity, lasting and fading period. As far as some existing but rare publicizing works are concerned, the volume still introduces them for future use. The volume not only is the base of the comprehensive study but also functions as brief history of on the punctuation and annotation of Tso chuan.