Due to peculiar way of life, aesthetic temperament and interest, and traditional customs, the middle class in contemporary China produce subculture relative to dominant culture of the whole society,and give birth to secondary value system that is not very consistent with the dominant value system, which makes the class's entire identity of socialist core values face with dilemma. Important characterization of the dilemma is, there is gap between the middle class's over expectations on three-level value goal andpolitical participation proposed by socialist core values and the existing system supply, and thus derivesto doubt on political system output ability that determine realizing of the value goal. To inhibit negativeinfluences on socialist core values from middle class subculture, it should construct institutional interest expression and comprehensive channels, improve the consciousness and ability of participation and givefull play to the function of mass communication.