This research aimed to study the academic adjustment of Kaohsiung county junior high PE class students. The goal was to understand the students¡¦ adjustment in school and further to explore whether there were remarkable differences when various backgrounds changed. The research adopted survey research methodology, using ¡§Academic Adjustment Scales¡¨ compiled by the researcher as an overall survey to the PE class students in Kaohsiung county junior high schools. 1435 copies had been sent out and 1064 valid questionnaires were received, with a valid return rate of 74%. Data were analyzed by the package software SPSS 14, using £\¡Õ.05 as a remarkable level, and the analytical methods included descriptive statistics, t-test, and one-way ANOVA etc. The findings of the research are as follows: 1.The overall academic adjustment of the Kaohsiung county junior high PE class students indicated in a fine condition. 2.The total scale and sub scales of the first-year (7th grader) junior high PE class students showed remarkable higher scores. 3.The total scale of academic adjustment and sub scale of learning adjustment indicated remarkable higher scores for female students. 4. For elementary graduates of non-PE classes, the total scale of academic adjustment and sub scale of learning adjustment demonstrated remarkable higher scores. 5.The total scale of academic adjustment and sub scale of learning adjustment for students who received more than five-day specialty training in a week showed remarkable lower scores. 6.The total scale of academic adjustment and sub scale of learning adjustment for students who received less than three-class specialty training in a day showed remarkable higher scores. 7.The total scale of academic adjustment and sub scales of learning adjustment and of teacher-student relationship were remarkable lower for students who had participated more than 11 competitions for this semester. 8.Students spent less than one hour afterschool study showed remarkable lower scores on the total scale of academic adjustment and each sub scale of all categories. 9.Students having five study classes showed remarkable lower scores on the total scale of academic adjustment, sub scales of learning adjustment and of physical training adjustment.