The invention belongs to the technical field of rice and shrimp breeding and particularly relates to a caterpillar harvester device. The device comprises a caterpillar harvester and a broken piece guide part arranged at a discharging port of the caterpillar harvester, the broken piece guide part is communicated with the discharging port of the caterpillar harvester, and the device further comprises a condensation material supply device arranged on the caterpillar harvester; the condensation material supply device is matched with the broken piece guide part and used for condensing broken strawsegments and comprises a material storage part and a material discharging part for discharging a material in the material storage part towards broken piece straw of the periphery side of the materialstorage part; slurry is used as the material in the material storage part. According to the caterpillar harvester device, by using the broken piece guide part, the condensation material supply device,an aeration mechanism, the slurry, the material discharging part and the like, only if it is guaranteed that the broken piece straw does not completely fall into water at one time, the aim of the invention is achieved.