Effective lesson planning and execution are ensured by deep text interpretation. The New English Curriculum reform currently places greater demands on students’ ability to read at a deep level, which raises the bar for fully evaluating the arrangement and structure of textual content. The focus of modern text linguistics, the theme-rheme theory and thematic progression pattern, play a significant role in interpreting textual composition and internal information structure of a discourse. Therefore, in order to increase the explanatory power in textual analysis, this study tries to apply theme-rheme theory and thematic progression to analyze the textual organization characteristics of expositions in National College Entrance Examination(NCEE) Volume A reading materials. Finally, this study gives the front-line teachers some reference based on the findings in order to improve their text interpretation, reading, and writing instruction, which will ultimately support effective teaching design and implementation.