The invention belongs to the field of daily use chemical supplies and relates to pore-fining liquid facial cleanser and a preparation method thereof. The facial cleanser is prepared from, by weight, 0.5-1.5 parts of butyl hydroxy anisd, 4-10 parts of cocamidopropyl betaine, 4-8 parts of volcanic mud, 3-8 parts of deep sea roe extract liquid, 4-8 parts of deep sea seaweed extract liquid, 3-7 parts of spermaceti, 2-7 parts of hydrolysate, 3-7 parts of avocado oil, 1-3 parts of citric acid, 3-7 parts of traditional Chinese medicine additives and 50-70 parts of sterile water, wherein the traditional Chinese medicine additives are prepared from witch hazel, chamomile, plums, peach blossom, white gourd seeds, walnut kernels and aloe. The facial cleanser is high in safety, free of anaphylactic reactions, rich in deep sea organism essence, inclusive of a variety of herbal active constituents and vocanic mud elements, fresh, cool, fine and smooth in quality, mild in decontamination and capable of well cleaning the skin, maintaining moisture of the cleaned skin and shrinking pores, and the skin is fresh and cool after being cleaned.