In this article it was tried to set forth of the reasons of transformation occurred today by basing on the presumption of identity-based transformation occurred in political parties. For this purpose, the currently experienced transformations in the political parties is discussed here in with regard to transformation of political arena by the neoliberalism and with regard to policies gaining much more acknowledgement that are rising on identities and differences due to dominant effects of postmodern rhetoric along with gradual power loss of class-based politics. As a matter of fact, neoliberalism deepens the distinction between the economy and politics and as a result the citizenship understanding including both the economic and social rights is alienated. Therefore, a citizenship understanding in which the emphasis on personal and cultural rights is more dominant and this leads the dominance of a democracy understanding while enhancing the importance of identity-based politics. On the other hand, by virtue of diminishing importance of class-based identity and with the effects of anti-essentialist approach born from postmodernism; this results in for the political parties to make a new style of politics in which the politics on the identities and differences are dominant.