The invention discloses a material collecting device for a plastic shell. The material collecting device comprises a shell body, a plurality of partitions, a baffle plate, a conveyor belt, a bracket and at least one storage box, wherein a charge hole and a gas outlet are formed in the top of the shell body; a gas inlet and a discharge hole are formed in the bottom of the shell body; the plurality of partitions are arranged in the shell body in a spaced mode in the vertical direction; openings are formed in the partitions; the baffle plate is arranged in the shell body, and is positioned below the lowest partition; a mesh hole is formed in the baffle plate; the conveyor belt is arranged below the shell body, and one end of the conveyor belt is opposite to the discharge hole; the bracket is arranged below the conveyor belt; and at least one storage box is arranged below the other end of the conveyor belt. The material collecting device disclosed by the invention can be used for preventing the plastic products from being broken by dropping; and the formed plastic products are collected after being cooled, so that the plastic products can be prevented from being deformed, manual operation is not needed, and labor efficiency is improved.