Disclosed are plant leaf skin care mask powder and a preparation method thereof. The mask powder is made from, by weight part, 10-11 of towel gourd leaves, 20-25 of tea, 10-12 of ginkgo leaves, 5-7 of Chinese yew leaves, 1-1.2 of L-vitamin C, 1-2 of pearl powder, 14-15 of seaweed meal, 15-16 of almond flour, 10-11 of potato flour, and 3-4 of composite essential oil. The mask powder is a pure natural product, is fine and delicately fragrant, and can efficiently remove skin dull, relieve aging, moisten the skin, improve the elasticity of the skin, supplement water of the skin and whiten the skin. No synthesized antiseptic or heavy metal components are adopted. Green production is achieved, and the mask powder doesn't cause any toxic or side effect on the skin.