The invention discloses a production device and a preparation process of a beauty maintaining and young keeping ferment. A PLC is used for achieving a constant temperature environment in the production device, the quality of the ferment is guaranteed, an exhaust unit, a stirring unit and an extrusion unit are arranged in a fermentation tank arranged in the production device, the exhaust unit achieves an automatic exhaust function of the ferment production device, labor is saved, and the phenomenon is avoided that other microorganisms enter the production device due to repeated cover opening and air release to influence the quality of the ferment. An expansion piece arranged on the stirring unit can drive a second stirring shaft to extend up and down, so that the function of comprehensivelystirring the materials is achieved, the extrusion unit can prevent a separation sieve arranged in a discharging pipe from being blocked when a fermentation liquor is collected, and meanwhile the residual fermentation liquor can be extruded out. The preparation process adopted by the device comprises simple steps, and the raw materials of the beauty maintaining and young keeping ferment are green,environmentally friendly, cheap and easily available, so that the production cost of the beauty maintaining and young keeping ferment is reduced.