High school vocal music education as a part of our music education cannot be ignored. The emotional strength of singers through music works is an important standard to measure the success of music works. Only by mastering the emotional expression of music works can we enhance the appeal of music and better show the singer's musical ability. Emotional expression and singing skills complement each other. This study conducted a survey on high school vocal art students using a questionnaire survey. The subjects of the survey were senior high school vocal art students from different regions of Shanxi Province. In this survey, 150 questionnaires were distributed in selected high schools through random sampling and 147 valid questionnaires were returned. The paper concludes that in the process of learning, students must first correct their learning attitude, clarify their learning goals, trust the teacher and cooperate with the teacher's teaching. Secondly, in the process of mastering knowledge, more self-thinking is required. Vocal music is a process of organic combination of few basic knowledge points to produce infinite possibilities. Finally, the knowledge should be summarized in time, sorted and mastered, because high school art students have limited learning time during this period, and it is necessary to avoid the same problem repeatedly.