The invention relates to a preparation method of fructus momordicae concentrated juice. The preparation method comprises the following steps of (1) selecting materials; (2) airing the selected materials; (3) crushing the aired materials; (4) performing cooking; (5) performing 
filtration; and (6) performing concentration. According to the preparation method of fructus momordicae concentrated juicedisclosed by the invention, the fructus momordicae concentrated juice is wide in 
raw material sources and low in production cost, the prepared fructus momordicae concentrated juice is good in mouth feel, sweet in 
flavor, clean, sweet and refreshing, and capable of clearing heat and 
quenching thirst, has the effects of nourishing 
throat, nourishing the lungs, resolving 
phlegm, relieving a cough, invigorating the 
spleen, regulating the flow of vital energy, promoting 
digestion, removing food stagnation, promoting 
appetite, neutralizing the effect of alcoholic drinks, reducing weight, reducing blood lipid, preventing 
constipation and the like, and has prevention and auxiliary treatment effects on 
laryngopharyngitis, gastroenteritis, high blood lipid, high 
blood pressure and heart diseases after being drunk for a long term.