Rotary distributing device of grain dryer

The invention discloses a rotary distributing device of a grain dryer. The rotary distributing device comprises a lifter, a feeding pipe, a humidity elimination opening and a grain storage section. The lifter is arranged on one side of the grain storage section, the feeding pipe is arranged at the upper end of the lifter, and the humidity elimination opening is formed in the upper portion of the grain storage section and communicated with the grain storage section. The lateral edge of the humidity elimination opening is communicated with the feeding pipe. The upper end of the grain storage section is fixedly connected with a connecting pipe, the lower end of the connecting pipe is rotatably connected with a motor, and a conical-surface distributor is fixedly connected to the motor. Convex ribs are fixedly connected to the outer surface of the conical-surface distributor. A power line of the motor penetrates through the connecting pipe to be connected with a power supply. According to the rotary distributing device, while grains slide down along the outer surface of the conical-surface distributor, the convex ribs fixedly connected to the outer surface of the conical-surface distributor push the grains to rotate along with the conical-surface distributor, and the grains fall in an inclined throw line; not only are the grains evenly distributed, but also the contact time of the grains with hot air flow in air is prolonged, and the temperature of the hot air flow is further lowered, so that the grain drying effect is improved, and the fissure ratio is lowered.