本研究主要目的在探討苗栗縣各高中職校學生自我傷害是否會隨其背景屬性的不同而有所差異，編製「高中職校學生自我傷害行為調查問卷」，以苗栗縣高中職校學生為研究對象，採抽樣法進行問卷調查，單因素變異數分析等方法進行統計分析與討論。 本研究主要結果： 一、學校位於鄉鎮地區師生互動、校風純樸、親師溝通均良好，學生較少以自我傷害的方式來解決問題。 二、學生在整體自我傷害層面，男生較女生嚴重、完全中學較其他類型學校嚴重、健康狀況、家庭氣氛與經濟、人際關係愈差的學生愈嚴重、父母婚姻狀況以母歿的單親家庭最嚴重、學業成績以最差及最好的學生最嚴重。 三、整體自我傷害層面，學校是否排定相關課程、家中排行順序無顯著差異。

The main purpose of this study is to probe into whether the students' self-injurious behaviors at national and private senior high and vocational schools in Miaoli County will be differentiated in accordance with the attributes of their backgrounds. On the strength of the results, suggestions are proposed as the prevention guidance for students' parents and their schools counselors. Investigation Questionnaire of Self-injurious Behaviors for Students at Senior High and Vocational Schools was drawn up and further developed into the research tool. Subjects were randomly sampled from national and private senior high and vocational schools in the county. The collected data were statistically analyzed and tested via means, t-tests, paired-sample one-way ANOVA and one-way MANOVA. The major results of the study are as follows: 1. Discussions about the current situations of students' self-injurious behaviors at national and private senior high and vocational schools in the county. 2. Discussions about the current situations on attributes of students' self-injurious backgrounds at national and private senior high and vocational schools in the county. 3. Assessments of students' self-injurious behaviors at national and private senior high and vocational schools in the county to see whether they will be differentiated in accordance with the attributes of their backgrounds. 4. Substantial suggestions are proposed on the strength of the empirical results.