The invention discloses a preparation method of heat clearing dampness draining health care 
edible oil, and the preparation method is as follows: according to a certain weight ratio, evenly mixing flaxseed, fructus perillae, pinenut kernel and kardiseed, and putting the mixture into a 
traditional Chinese medicine decoction liquid of 
isatis root, 
desmodium, 
oldenlandia diffusa, 
solanum melongena root, radix paeoniae rubra, malt, white 
gourd leaf and the like for boiling for 20-30min by using soft fire, filtering, concentrating a filtrate, 
drying into 
powder by low temperature freezing, draining off 
moisture in the mixture, first using intense fire to fry the mixture for 2-3min, then using moderate and soft fire to fry for 3-5 min, then rolling into a material blank while the mixture is still hot, successively 
steaming, frying, squeezing and refining to obtain refined 
edible oil, adding freeze-
drying powder, boiling and cooking, then finely filtering, cooling, bottling, sealing and packaging to obtain a finished product. The 
edible oil is rich in nutritional ingredients, contains a plurality of Chinese herbal 
medicine components, has the effects of clearing heat and draining dampness, invigorating the 
spleen and benefiting the 
stomach, nourishing the 
lung and moisturizing 
dryness and the like, and can be used for the prevention and treatment of lower 
abdomen distension, muddy red 
urine, 
frequent urination acerbity pain, endless and unsmooth 
urine, yellow and greasy 
tongue fur and other symptoms.