Based on the career construction therapy, this paper explores the relationship between personality, calling, career engagement(CE) and self-defeating job search behavior(procrastination and impulsiveness) among university students, as well as the intermediary role of career adaptability(CA) in this relationship. 337 students were randomly selected from 2 universities to complete the big five personality scale, the brief calling scale, career engagement scale and the job search procrastination and impulsive behavior scale for statistical analysis including correlation analysis and regression analysis. The study results confirmed the significant positive impact of calling on career engagement, and career adaptability partial mediated the relationship between calling and career engagement. Among the personality dimensions, conscientiousness and openness to experience had significant influence on career engagement, and the study confirmed career adaptability mediated the relationship in this relationship. Conscientiousness, openness to experience and neuroticism had significant influence on job search procrastination (JSP); and career adaptability mediated the relationship between conscientiousness, openness and job search procrastination. © 2017 IEEE.