The invention discloses a flavored beverage capable of promoting the production of body fluid to quench thirst and a preparation method of the flavored beverage. The beverage is prepared from the following raw materials in percentage by weigh of 5-10% of pyrus spp juice, 4-8% of saccharum officinarum juice, 2-4% of a canarium album extracting solution, 2-4% of a heleocharis dulcis extracting solution, 0.5-1.0% of honey, 0.1-0.4% of chitosan, 0.2-0.4% of citric acid, 2-4% of white granulated sugar, 0.1-0.2% of sucralose, 0.05-0.1% of edible salt, 0.01-0.03% of edible essence and the balance ofwater. The preparation method comprises the following steps of preparing the pyrus spp juice, preparing the saccharum officinarum juice, preparing the canarium album extracting solution, preparing theheleocharis dulcis extracting solution, performing blending, performing degassing, performing sterilizing, performing filling and the like. The flavored beverage capable of promoting the production of body fluid to quench thirst is reasonable in collocation of component proportion, refreshing in mouth feel and unique in fragrant odor, can be daily drunk as a beverage, is free from side effects onbodies, can be used as a health-care beverage, has favorable efficacy of promoting the production of body fluid to quench thirst, and nourishing the lung, is safe and healthy, and can be drunk for along term for people of all ages and both sexes.