The invention discloses a fermented fruit and vegetable juice and a making method thereof. The raw materials comprise vegetables and fruits, the vegetables include white radish, carmine radish, red radish, celery, cabbage, Chinese cabbage, cucumber and carrot, the fruits comprise apple, pear, orange, pineapple, small persimmon, kiwi and strawberry, and the sum of the added amount of vegetables andfruits in the juice is 20-50% of the total weight of the product, and the ratio of vegetables to fruits is 1 :2-2:1, and the fermentation is carried out using a probiotic which is a mixture of one orboth of Lactobacillus plantarum and Lactobacillus paracasei. The fermented fruit and vegetable juice of the invention is obtained by adding fruits and vegetables to be fermented together, and the fermented fruit and vegetable juice has moderate acidity, good flavor and nutrient composition of fruits and vegetables, and is a nutritious and safe fruit and vegetable juice product. The fermented fruit and vegetable juice not only improves the sensory quality of fermented fruit and vegetable juice, but also increases the nutritional value, prolongs the shelf life, and meets the modern consumer's healthy consumption concept.