The invention discloses compound fruit and vegetable beverage and a preparation method thereof. The compound fruit and vegetable beverage is characterized by being prepared from the following raw material components in parts by mass: 50 to 60 parts of pineapples, 20 to 25 parts of tomatoes, 15 to 25 parts of carrots, 20 to 30 parts of pumpkins, 40 to 50 parts of tangerines, 15 to 20 parts of a sweetener, 5 to 10 parts of a sour agent, 0.08 to 0.12 part of a stabilizer and 400 to 500 parts of water. The beverage is rich in various vitamins, can meet the energy required by a human body, and has no food additives which are harmful to the human body. The prepared fruit and vegetable beverage has the advantage of nutrition maintaining and healthiness.