Grain drying machine and grain moisture detection method

The invention discloses a grain drying machine and a grain moisture detection method, and relates to the technical field of grain drying. The grain drying machine comprises a drying tower, a feeding device, a conveying device, a hot air system and a control system, a plurality of conveying belts and inclined plates are arranged in the drying tower, and the conveying belts and the inclined plates are adjacently arranged in the vertical direction; and connecting grooves are formed in the upper surfaces of the inclined plates, material receiving hoppers are arranged on the upper surfaces, corresponding to the higher sides of the inclined plates, of the connecting grooves, and discharging openings are formed in the positions, located in the connecting grooves, of the lower sides of the inclined plates. According to the grain drying machine, the drying tower is divided into three relatively independent parts including a first drying area, a second drying area and a third drying area, and dry hot air is fed through