The invention provides herba corydalis saxicolae tea. The herba corydalis saxicolae tea is prepared from, by weight, 20-40 parts of herba corydalis saxicolae, 20-40 parts of sweet tea, 20-40 parts of fructus momordicae and 20-40 parts of licorice roots, wherein the weight parts are metered by the dry raw materials with the water content not exceeding 10%. The herba corydalis saxicolae tea has the effects of clearing away heat and toxic materials, promoting diuresis, moistening the lung to benefit the throat and expelling phlegm to arrest coughing, can treat hepatitis, aphthous stomatitis, sphagitis, amygdalitis, an eye inflammation, slight corneal opacity, dysentery, diarrhea, abdominal pain, acute gastritis, constipation, hemorrhoidal bleeding and the like and also has the nutrition and healthcare effects; in addition, due to the fact that the herba corydalis saxicolae tea belongs to a sugar-free product, the herba corydalis saxicolae tea is specially suitable for obese people and diabetic patients and can reduce weight and fat, and patients suffering from cardiovascular diseases, obesity, diabetes and the like all can drink the tea; the herba corydalis saxicolae tea is good in mouthfeel and convenient to take and can be drunk by being directly brewed with boiling water. The invention further provides a preparation method of the herba corydalis saxicolae tea.