The invention discloses quantitative discharging type fermentation equipment and a fermentation method thereof. The quantitative discharging type fermentation equipment comprises a barrel, a spiral conveying shaft, a driving device, a heating device and a material receiving bin, wherein the barrel is provided with a feeding port and a discharging port which are located in the two ends; the spiralconveying shaft is arranged in the barrel body in the axis direction of the barrel body in a self-rotating mode; the driving device drives the spiral conveyor to rotate; the heating device is positioned on the barrel body; and the material receiving bin is arranged at the discharge port, a weighing sensor is integrated on a bottom plate of the material receiving bin, and the bottom plate of the material receiving bin can be opened and closed. According to the scheme, spiral horizontal conveying is adopted; forward movement and backward movement of materials can be realized; the standing time of the materials is controlled; the materials are turned over; the barrel body does not need an outlet capable of being automatically opened and closed, the internal structure is greatly simplified, the material receiving bin integrated with weighing equipment is arranged at the discharging port, a bottom plate of the material receiving bin can be opened, online quantitative discharging is effectively achieved, quantitative packaging is easy, and compared with the prior art, a feasible automatic weighing and discharging mode is provided.