The invention belongs to the technical field of organic fertilizer production equipment, and particularly relates to an organic fertilizer fermentation production line, comprising a fermentation tank,a discharge barrel, a dryer, a screening machine and a pelletizer, wherein the dryer, the screening machine and the pelletizer are connected with a discharge outlet of the discharge barrel end to endsequentially through pipelines. A motor is arranged at the top end of the fermentation tank, a stirring shaft connected with the motor extends to the fermentation tank, a plurality of stirring bladesare uniformly arranged, from top to bottom at equal interval, on a portion, located in the fermentation tank, of the stirring shaft, the lower end of the stirring shaft is close to the bottom wall ofthe fermentation tank, a water jacket is arranged on the outer wall of the fermentation tank, an electric heating wire is arranged in the water jacket, and a pressure gauge, a thermometer and an oxygen concentration meter are arranged on the outer wall of the fermentation tank. With the design of the fermentation tank and discharge treatment devices, the organic fertilizer fermentation productionline can realize fermentation and automatic discharge of organic fertilizers, and has the advantages of reasonable and scientific design, simple structure and high convenience in use.