The invention provides a fruit juice beverage and preparation method thereof, which is composed of pineapple, hami melon, honey, white sugar and egg white sugar as main raw materials as well as sodium chloride, citric acid, honey flavor, pineapple and hami melon flavor, ethyl maltol and water as ingredients according to the weight percentages as follows: 5% to 15% of pineapple, 1% to 10% of hami melon, 1% to 5% honey, 10% to 15% of white sugar, 0.05% to 0.07% of sodium chloride, 0.05% to 0.07% of citric acid, 0.01% to 0.05% honey flavor, 0.05 to 0.1% pineapple flavor, 0.0015% to 0.0017% of ethyl maltol and remaining water. After the raw materials are processed, the working procedures of blending, mixing, vacuum degassing, sterilization and the like are finished; the fruit juice beverage has simple and reasonable technology, right proportioning and high content of solid contents, which has nutrient contents of various amino acids and trace elements needed and holds the natural fragrance of honey, pineapple and hami melon. The fruit juice beverage has fragrant taste as well as cool, sweet and sour mouth feeling, which is suitable for all ages and is applied to long time drinking.