Corn straw separating device

The utility model provides a corn straw separating device. The corn straw separating device is arranged on an agricultural harvester and connected with a conveying chain harrow assembly which is used for conveying corn straws; the corn straw separating device comprises two shafts moving relatively to each other; the two shafts are arranged in parallel at an interval; teeth are formed on the two shafts; baffle plates are arranged above the two shafts, respectively; an opening for feeding the corn straws into the separating device is reserved between the two baffle plates; covers covering the two shafts are arranged at the bottoms of the shafts; discharge holes are formed in the cover. The device is simple in structure, and capable of squeezing and crushing the corn straws thoroughly; the device is arranged on the agricultural harvester and can be used for crushing the corn straws while corn is harvested, and therefore, the manpower and the material resources are saved, and the efficiency is improved.