Abstract: The application discloses a uniform material distribution control method and system for fermentation tank in an aerobic fermentation apparatus for organic solid waste. A total amount of materials in the fermentation tank and an average material distribution amount at each material distribution point are acquired; a target speed for material distribution at each material distribution point is determined according to the total amount of materials, the target speed is corrected according to the average material distribution amount and a target average material distribution amount when the average material distribution amount is not equal to the target average material distribution amount, and an advanced announcement time of the target speed is calculated according to the corrected target speed, a distance in the fermentation tank and a closed-loop regulation lag time; a closed-loop control to the total amount of materials is performed based on the advanced announcement time of the target speed.