The job polarization in the U.S. labor market has been widely discussed. This paper uses the CPS-MORG data to examine the robustness of the polarization phenomena to different time periods and business cycles. A special focus is on the high-skill occupations. This paper investigates the structural characteristics of the high-skill occupations and also reveals the education effect on the wage increase of the high-skill jobs relative to low-and middle-skill occupations. Based on the results, the wage polarization is robust to both time periods and business cycles while the employment share polarization is very sensitive to both. According to the counterfactual experiment, the managers and professional occupations account for a large proportion of the employment share increase and almost all of the wage increase for the high skill occupations. The increase in marginal benefit of a graduate degree is mainly enjoyed by the high-skilled workers from 1980 to 2013. The increase in marginal benefit of a college degree is mainly enjoyed by the middle-and low-skilled workers during the same period.