The present disclosure discloses a blade seat assembly including a blade assembly, a clasp assembly, and a blade seat. The blade assembly includes a blade and a shaft, the blade being connected to one end of the shaft. The blade seat defines a mounting groove, and the other end of the shaft detachably is connected to the mounting groove via the clasp assembly. The present disclosure also provides a blending cup assembly and a food processor, which use the blade seat assembly. The technical scheme of the present disclosure aims to enable the blade assembly to be disassembled.