The invention discloses a clearing and moistening liquid for resisting blue light radiation and improving the vision and a preparation method thereof. The clearing and moistening liquid comprises, byweight, 10-15 parts of honeysuckle flowers, 5-10 parts of chrysanthemums, 10-15 parts of butterflybush flowers, 10-12 parts of cassia seeds, 8-11 parts of bat dung, 10-15 parts of mulberry leaves, 1-10 parts of panax ginseng, 5-10 parts of pearl powder, 1-5 parts of borneol, 4-7 parts of menthol, 5-10 parts of cortex phellodendri, 3-5 parts of honey, 1-5 parts of glycerin, 1-3 parts of carbomer, 1-3 parts of taurine, 1-4 parts of fibroin, 0.1-0.5 part of lutein, 0.1-0.5 part of proanthocyanidin and 20-30 parts of deionized water. The clearing and moistening liquid has the advantages that by combining traditional Chinese medicine extracts with chemical products, mixed liquid medicine is prepared through the combination of Chinese and Western medicine; traditional Chinese medicine componentscan be used for relieving eye fatigue, clearing the liver, improving the vision, preventing and treating sore, red and tearing eyes, absorbing electromagnetic radiation and reducing the influence ofradiation and blue light on the vision; chemical compositions can be used for keeping the eye moist constantly, so that the liquid medicine quickly permeates into the cells and eliminates the conjunctival congestion, and the eyes and the brain are quickly refreshed and soothed.