The invention discloses a preparation method for roselle lemon fruit tea, and belongs to the field of beverage 
processing. The preparation method is characterized by employing a three-step preparation technological process, and the process comprises: 1) extracting roselle juice, concretely, selecting a 
raw material, cleaning, 
blanching, pulping, performing thermal-insulation extraction, centrifuging, performing 
enzyme processing, and loading a tank with the juice; 2) extracting 
lemon juice, concretely, selecting a 
raw material, cleaning, 
slicing, boiling, pulping, performing 
enzyme processing, centrifuging, processing by using a 
colloid mill, and loading a tank with the juice; and 3) mixing according to proportions and loading, concretely, mixing according to the proportions, homogenizing, performing vacuum degassing, sterilizing, loading and obtaining the finished product. The beneficial effects comprise that the product is mellow in taste and sour-sweet in 
mouthfeel, and has the rich fragrance of roselle and the unique 
mouthfeel of lemon; more nutrients are obtained through separation and 
decomposition on the raw materials by performing 
enzyme processing; and the product is palatable in sourness and 
sweetness, proper in 
viscosity, unique in clear fragrance and abundant in amino acids, organic acids, 
vitamin C and other nutrients, is beneficial for regulating and balancing blood fat, promoting 
calcium absorption and promoting 
human body metabolism and delaying 
ageing phenomenon, also has the functions of clearing away 
summer heat, activating blood and tonifying blood, keeping young and maintaining beauty, and is green healthy nutritive drink.