In this study my aim is to analyze the characteristics and problems of the official proposal for changing equalization policy in high school. The focus is on the proposal of the educational authorities in Chonbuk province. In the new proposal, high schools are to be entitled to both special selection of 20-30 percent of "bright" middle school graduates and ability grouping for these bright students only. This study shows that the proposal has the serious flaws. For it is made mainly on the basis of wrong assumptions about ability grouping. In addition, the suggested solutions to the "side effects" of ability grouping that are identified in the proposal will not be effective. The conclusion of the study is that if the proposal is executed, it will not only make negative effects on the normaliztion of education in middle school, but also bring out the negative results such as institutionalization of inequality at the level of high school.