With the development of social media, the internet has emerged as an increasingly important space for feminist activists. Based on the paradox of the participation of the privileged, this paper explores the exclusionary discourses that the male feminists as feminist advocators encounter from feminist solidarity when they participate in debates about the gender issues in network public sphere and analyzes the causes. The study shows that the exclusionary discourses mainly reflect that the feminist solidarity distrusts the motives of male feminists and their standpoints of epistemology, and alienates male feminist advocators, and that such discourses stem from complex technical and social factors, including the weak continuity between the discourses and actions, the epistemological conundrum of distinguishing the benevolent sexism from cultural behaviors without any intension of sexism, and the base of solidarity itself on experiencing some forms of oppression or injustice. The clarification and reflection of this paradox can lead to better understanding, less conflicts and stronger solidarity between two sexes so as to achieve genders equality eventually.