Objective: The problem of study-weariness among Chinese adolescents is becoming more and more serious. In order to have a more comprehensive understanding of adolescents’ study-weariness and to carry out more targeted prevention and intervention of adolescents’ study-weariness, we developed the Degree of Study-Weariness Scale and the Reasons of StudyWeariness Scale to investigate the current situation of adolescents’ study weariness by combining literature research and interviews with several front-line teachers and counselors who have rich experience in dealing with adolescents’ study-weariness. Methods: High school students completed the questionnaire on a voluntary basis. The Degree of Study-Weariness Scale, the Reasons of Study-Weariness Scale, and the Adolescent Student Burnout Inventory were administered. Results: The two scales developed in this study had good reliability and validity. The internal consistency coefficients of the dimensions of the Degree of Study-Weariness Scale ranged from 0.71 to 0.92; the correlation coefficients of the dimensions ranged from 0.47 to 0.69, and the correlation coefficients with the total scores ranged from 0.78 to 0.92, and the correlation between the Degree of Study-Weariness Scale and the Adolescent Student Burnout Inventory was 0.71 (p<0.01). The internal consistency coefficients of the dimensions of the Reasons of Study-Weariness Scale ranged from 0.73 to 0.91; the correlation coefficients of the dimensions ranged from 0.53 to 0.79, and the correlation coefficients with the total scores ranged from 0.78 to 0.90, and the correlation between the Reasons of Study-Weariness Scale and the Adolescent Student Burnout Inventory was 0.723 (p<0.01). 63.6% of the students had a moderate level of study-weariness and 10.7% had a high level of study-weariness. There were differences in high school students’ study-weariness in terms of grade, gender, and academic performance. The correlations between the degree of study-weariness and the dimensions of reasons for study-weariness: with self-stress is 0.728, with parental stress is 0.488, with school stress is 0.760, and with environmental stress is 0.597. Conclusion: (1) The Degree of Study-Weariness Scale and the Reasons of Study-Weariness Scale had good reliability in the sample of high school students; (2) female students and students with lower academic performance had higher levels of study-weariness. The factors that were most correlated with the level of studyweariness were factors from school and self.