The invention discloses a potato peel and radix ophiopogonis composite health beverage and a preparation method thereof, and belongs to the technical field of functional beverages. The beverage is composed of the following components: potato peel, radix ophiopogonis, hawthorn fruit, ligustrum lucidum, radix angelicae pubescentis, pulsatilla, ginger, pueraria lobata, astragalus, poria cocos, mangnolia officinalis, wide jujube seed, polygonum multiflorum, licorice, citric acid, fresh bamboo leaves, cellulase, amylase and white sugar. The preparation method comprises the following steps of determining the ratio, preparing a potato peel liquid, preparing a radix ophiopogonis juice, preparaing an auxiliary liquid, homogenizing, degassing, filling and sterilizing. The pototal peel obtained afterdeep processing of potatoes can be adopted for secondary utilization, and the radix ophiopogonis is added as a main material. The beverage has the advantages of immune regulation, blood sugar lowering, fatigue resistance and aging resistance.