Objectives In this study, the relationship between career activity types and career maturity according to the grade change of students from Vocational high schools was analyzed.
 Methods For this purpose, data from the 7th year (2016: 515 persons), 8th year (2017: 479 persons), and 9th year (2018: 462 persons) of the Seoul Education Longitudinal Study 2010 were used. In addition, three career activity types were set as independent variables and career maturity was set as dependent variable. Based on the set independent and dependent variables, descriptive statistics and multiple regression analysis by grade were conducted.
 Results As a result of descriptive statistics, the perception of career activity types and career maturity of students from vocational high schools were maintained at a moderate level. In addition, students from vocational high schools were positively aware of counseling with their parents in the analysis of career activity types, and the level of self-understanding was relatively low compared to other factors in the analysis of career maturity. Next, as a result of multiple regression analysis, the career maturity of students in vocational high schools was influenced by counseling activities and information acquisition activities in the order of the first year of high school, in the order of information acquisition activities and counseling activities during the second year of high school, and in the order of information acquisition activities and counseling activities in the third year of high school. The timing was influenced only by the participation activity.
 Conclusions Based on this, it was suggested to check the contents and qualitative aspects of career activities, the need for parent training, consider ways to strengthen self-understanding, and apply career education stages according to the analysis of influence relationships.
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