國中生閱讀興趣成長對國文科學習成績的影響值得探討。本研究以基隆市國中生學習狀況資料庫，分析1,586名學生閱讀興趣成長軌跡，並瞭解閱讀興趣對國文科學習成績的影響，在五學期資料的潛在成長模式分析之後，獲得結論如下：國中生閱讀興趣成長軌跡呈現W型成長現象，國三上學期閱讀興趣最低，閱讀興趣最高在國二下學期，但是不同學期的閱讀興趣沒有明顯差異。國一學生的閱讀興趣愈高，國三下學期國文科學習成績愈好；而國中生五學期閱讀興趣成長，在國三下學期國文科學習成績提升。本研究重點在於發現，國中生閱讀興趣呈現W型成長現象，並沒有穩定成長，同時閱讀興趣對國三學生國文科學習成績有提升效果。針對結論討論，提出建議。

The impact of the growth of junior high school students’ interest in reading on the academic achievement of Chinese is worth exploring. This study used the Keelung junior high school students’ learning status da¬tabase to analyze the growth trajectory of 1,586 students’ reading inter¬est and understand the impact of reading interest on Chinese academic performance. After analyzing the potential growth model of the five-se¬mester data, the conclusions were as follows: Junior high school students’ reading. The growth trajectory of interest showed a W-shaped growth phenomenon. The reading interest was the lowest in the first semester of the ninth grade, and the highest in the second semester of the eighth grade. However, there was no significant difference in reading interest in different semesters. The higher the reading interest of seventh-grade students, the better their performance in Chinese in the second semester of ninth grade; while the growth of reading interest in junior high school students in the fifth semester increases their performance in Chinese sub¬ject in the second semester of ninth grade. The characteristic of this study was that it is found that middle school students’ reading interest showed a W-shaped growth phenomenon, and there is no steady growth. However, reading interest had an effect on improving the academic achievement of ninth grade students in Chinese subject. Suggestions were made for the conclusion discussion.