A compound ferment production process and a product thereof are applicable to the technical field of foods. The formulation of the product comprises fruit vegetable ferment raw juice, plant ferment raw juice, corn ferment, peas ferment and multielement alditol. The production process comprises the following: a step of preparing fruit vegetable ferment liquid, during which, selecting and cutting fresh fruits and vegetables into slices or pieces, blending the slices or pieces, adding apple vinegar on the slices or the pieces, and storing the fruits and vegetables hermetically at room temperature to prepare the fruit vegetable ferment raw juice through natural fermentation; a step of preparing the plant ferment liquid, during which, selecting, chipping and blending herbal plants, adding common salt into the sliced herbal plants, and storing the sliced herbal plants hermetically at room temperature to prepare the plant ferment raw juice through natural fermentation; and a step of fermentation and product processing, during which, taking the fruit vegetable ferment raw juice, the plant ferment raw juice, the corn ferment and the peas ferment, carrying out the second fermentation at room temperature, adding the multielement alditol during the second fermentation, using a sealed jar during the fermentation, preparing the compound ferment product after a postmaturation process, and preparing the liquid, powdery and solid particle ferment through mechanical processing and forming. The process and the product thereof which have a novel and scientific design and long-term maturation through the natural fermentation can increase the vitality of the ferment, facilitate the demand of a human body and improve the health of the human body through frequent edibility.