The invention relates to the technical field of shoe materials. The invention relates to coffee grounds, in particular to coffee grounds shoes and a preparation method thereof. The formula comprises the following raw materials in parts by weight; 4-8 parts of coffee grounds, 30-40 parts of polyethylene, 1-3 parts of a chain extender, 1-5 parts of an antioxidant, 16-20 parts of deionized water, 1-5parts of modified SBS, 8-12 parts of isocyanate, 0.05-1.0 part of a surfactant, 0.1-0.4 part of a first catalyst and 0.05-0.1 part of a second catalyst. The shoe material disclosed by the invention is prepared by taking coffee grounds as raw materials, so that the recycling property of wastes is improved, and the prepared shoe material has excellent peel strength, thermal aging resistance, waterresistance and deodorization effect, can be naturally decomposed after being used, and does not pollute the environment; the preparation method is simple, efficient, convenient to operate and control,high in product quality, low in cost and beneficial to industrial production.