In the aesthetics of Simmel, the impressionism style of aesthetic experience of modernity comes from the attention to fragments, and he constructs an aesthetic redemption path in the fragments. The aesthetic modernity fragments theme of Simmel continues and amplifies in the text of the Frankfurt School, such as Kracauer, Bloch and Benjamin. Kracauer emphasizes the historical natural restoration of modernity fragments, Bloch resorts to philosophical metaphor of modernity fragments, and Benjamin hopes to achieve modern people's aesthetic redemption in the fragments and ruins. Fragments and ruins have become the common tags and marks in their texts, which constructs the aesthetic thought Genealogy of modernity Fragments from Simmel to the Frankfurt School.