The invention relates to a snake gall eye mask and a preparation method thereof. Effective ingredients of the eye mask comprise raw materials in parts by weight as follows: 72-86 parts of deionized water, 0.03-0.13 parts of EDTA2Na, 0.1-0.8 parts of allantoin, 2-6 parts of propylene glycol, 4-8 parts of 1,3-butanediol, 4-10 parts of glycerin, 0.1-0.4 parts of sodium hyaluronate, 0.1-0.6 parts of raw xanthan gum, 0.1-0.6 parts of dipotassium glycyrrhizinate, 8-20 parts of rose hydrolat, 0.2-1 part of a snake gall extract and the like. The eye mask has the characteristics that the eye mask can effectively supplement water, remove dry lines on eyes, relieve eye fatigue, remove crow's feet on eyes, recover skin elasticity, remove eye edema, black eye, pouch and eye winkles, has no side effects and the like.