The invention discloses a tea for regulating prostatitis and a preparation method thereof. The tea comprises, by weight, 17.5 to 27.9 portions of fermented jerusalem artichoke powder, 45 to 55 portions of fermented tea leaves, 5 to 15 portions of dandelion, 5 to 15 portions of pumpkin seeds, 2 to 8 portions of radix astragali, 1.5 to 3.1 portions of lycopene, 0.005 to 0.015 parts of sodium selenate and 0.005 to 0.015 parts of zinc sulfate. The preparation method comprises mixing fermented jerusalem artichoke powder, fermented tea leaves, lycopene, dandelion, pumpkin seeds, radix astragali, sodium selenate and zinc sulfate, and grinding the mixture to obtain fine powder. The tea can be conveniently drunk through mixing with water, can be easily absorbed by the human body, has high curative effects, produces effects fast, has functions of removing toxins and promoting blood circulation, tonifying Qi and tonifying kidney, diminishing inflammation and relieving pain, eliminating or significantly relieving medium-elderly man perineum discomfort, pubis upper zone discomfort, inguinal region discomfort and genitals pain and discomfort, and eliminating or significantly relieving feeling of burning, urgent urination, frequent micturition and incomplete emptying in urination.