《重校經史海篇直音》是首部全面直音化《四聲篇海》的明代大型楷書字典。該書在全面承襲《四聲篇海》的基礎上對其編排和說解進行了全方位的改造。該書一方面調整了《四聲篇海》的歸部及收字，並在部分部首下突破了《四聲篇海》承自《玉篇》的“據義歸部”原則，成為《字彙》“蓋論其形，不論其義”的“據形歸部”原則之先聲；另一方面作為首部對《四聲篇海》進行全面直音化改造的字書，《重校海篇》開啟了“海篇類”字書以直音法注音的歷史。
本文包含緒論和五章正文：
緒論部分說明了本文的選題意義、研究綜述、研究內容與方法。其中研究綜述部分首先對中國字典及明代字書發展歷史進行了一定的梳理，並綜述了前人對“海篇類”字書的研究和直音法相關的研究，為本文的研究提供了可借鑒的方法。
第一章是《重校經史海篇直音》概述。首先對《重校海篇》一書的源流進行了梳理，找準該書在字書史上的位置，並在前人研究的基礎上，對該書的所據底本及成書年代進行考察與推定；其次介紹該書的編排體例，說明其部首、收字、說解的體例和內容。
第二章是《重校海篇》的歸部與收字研究。以該書第一卷46個部首及4062個下轄字為主要研究材料，通過與《四聲篇海》的比較，得出本書“據義歸部”與“據形歸部”並存的歸部原則。其次對收字的取捨進行研究，總結《重校海篇》合併《四聲篇海》字頭、改換《四聲篇海》字序的原因和依據。最後對《重校海篇》與《四聲篇海》字頭字形進行比較，得出其存在部件異寫和部件混同的結論。
第三章是《重校海篇》對《四聲篇海》直音化改造研究。以該書前3000個下轄字為主要研究材料，通過《重校海篇》直音字與《四聲篇海》反切的音韻地位對比，得出《重校海篇》直音化改造《四聲篇海》的主要方法：在考辨、歸併《四聲篇海》反切的基礎上，進行注音替換。最後根據兩書的注音替換情況，說明《重校海篇》的音系性質，並對《重校海篇》直音化改造《四聲篇海》的準確性進行測定。
第四章是《重校海篇》的直音字系統研究。從《重校海篇》對《四聲篇海》原有直音字的改造和對自身直音字系統的優化兩方面，得出其有意識形成直音字系統、提高直音字注音效率的特點。最後對《重校海篇》以直音字系統改造《四聲篇海》注音的情況進行總結，並指出其注音優勢。
第五章是《重校海篇》評價。立足上述各部分的研究，對《重校海篇》的價值與不足分別進行概括。

Chongjiao Jingshi Haipian zhiyin is the first comprehensive straight tone Sisheng Pianhai large regular script dictionary of the Ming Dynasty. On the basis of inheriting the Sisheng Pianhai in an all-round way, the book has reformed its arrangement and interpretation. On the one hand, the book adjusts the merging radicals and collecting characters of Sisheng Pianhai and breaks through the principle of "merging radicals according to meaning" inherited from Yu Pian in part of the series, and becomes the pioneer of the principle of "merging radicals according to form regardless of meaning" in Zi Hui. On the other hand, as the first character book to comprehensively transform the Sisheng Pianhai into a straight tone, Chongjiao Haipian opens the history of "Haipian type" character book with a straight tone notation. 
This paper contains an introduction and five chapters:
The introduction part introduces the significance of the topic selection, research summary, research content and methods. In the part of research review, it firstly combs the development history of Chinese dictionary and Ming Dynasty character books to a certain extent, and summarizes the predecessors' research on "Haipian " type character books and the related research on straight pronunciation, which provides a reference method for the research of this paper.
The first chapter is the overview of Chongjiao Jingshi Haipian zhiyin. First of all, the origin of Chongjiao Jingshi Haipian zhiyin is sorted out, to find out the position of the book in the dictionary history, and on the basis of previous studies, the basis of the book and the date of the book is investigated and presumed; Secondly, it introduces the format of the book, and explains the style and content of the radicals, words and solutions.
The second chapter is a study on the merging radicals and collecting characters of Chongjiao Haipian. Based on the 46 radical and 4062 subordinate characters in the first volume of the book as the main research materials, the author concludes the principle of " merging radicals according to the meaning" and " merging radicals according to the form" in the book by comparing it with Sisheng Pianhai,. Secondly, it studies the choice of collecting characters, and summarizes the reasons and basis for combining the character of Chongjiao Haipian. with Sisheng Pianhai and changing the character order of Sisheng Pianhai. Finally, by comparing the character pattern of Chongjiao Haipian. with Sisheng Pianhai, it is concluded that there are different parts and mixed parts.
The third chapter is a study on the straight tone transformation of Chongjiao Haipian. Based on the 3000 subordinate characters in the book as the main research materials, and through the comparison of the phonological status of the straight tone characters in Chongjiao Haipian and Fanqie in Sisheng Pianhai, the main methods of the straight tone transformation in Chongjiao Haipian are obtained: on the basis of identifying and merging the anti-cut characters in Sisheng Pianhai, the Zhuyin replacement is carried out. Finally, according to the substitution of Zhuyin in the two books, the phonological nature of Chongjiao Haipian Text is explained, and the accuracy of the straight tone transformation of the Sisheng Pianhai and Chongjiao Haipian is measured.
The fourth chapter is the study of the straight tone character system in Chongjiao Haipian. It's expanded in two parts: The original straight tone character of Sisheng Pianhai was reformed by Chongjiao Haipian, and the optimization of its own straight tone character system, it is concluded that it consciously formed the straight tone character system and improved the efficiency of the phonetic injection of the straight tone character. Finally, the paper summarizes the situation of the transformation of phonetic transcription in Chongjiao Haipian with the straight tone character system, and points out the advantages of phonetic transcription.
The fifth chapter is the evaluation of Chongjiao Haipian. Based on the research of the above parts, the paper summarizes the value and deficiencies of Chongjiao Haipian respectively.