A production method for animal excretion treatment material and a production device therefor, having a step in which a raw material is pulverized and a pulverized material is obtained and a step in which the pulverized material is granulized. In the step in which the pulverized material is obtained, the raw material is pulverized by a pulverizer (300) and the pulverized material is obtained. The pulverizer (300) has: an insertion port (310) for the raw material a pulverization chamber (320) for the raw material a pulverization mechanism (330) provided inside the pulverization chamber (320) a mesh screen (340) through which passes the raw material pulverized by the pulverization mechanism (330) and having a plurality of openings and a discharge port (340) connected to the openings in the mesh screen (340).
