Air reverse circulation choke device

The utility model discloses an air reverse circulation choke device which comprises a tray, a choke ring rubber plate and a pressure plate, the tray is fixedly arranged on the double-wall short section in a sleeving mode, the choke ring rubber plate is arranged on the double-wall short section in a sleeving mode and fixedly installed on the tray, and the pressing disc is arranged on the double-wall short section in a sleeving mode and fixedly installed on the choke ring rubber plate. The choke ring rubber plate comprises a large rubber mat and a small rubber mat, and the large rubber mat and the small rubber mat are sequentially arranged on the tray; the choke ring rubber plate is pressed under the combined action of the pressing disc and the tray, the tray and the double-wall short section are integrally designed, the choke ring rubber plate can be kept stable in the drilling process, and therefore the sealing performance of the choke ring rubber plate is guaranteed; the choke ring rubber plate is made of a