The invention discloses 3D printed food package ink and a preparation method thereof, belongs to the technical field of 3D printing materials, relates to a gypsum material for 3D printed food packages, and further relates to a preparation method and a use method of the gypsum material. The ink consists of the following components in percentage by weight: 87-98% of basic ink, 0.5-2.5% of a retarder and 0-10% of epoxy resin. The preparation method of the ink comprises the following steps: pre-treating packing; adding the retarder, pre-treating packing and a modifier, adding gypsum powder and a pigment, and performing uniform mixing so as to obtain the basic ink; adding the retarder and the epoxy resin into the basic ink, and uniformly mixing, thereby obtaining the 3D printed food package ink. The 3D printed food package ink has the beneficial effects that firstly, a finished product of the food package is high in strength, high in resolution rate, small in printing error, small in porosity and good in surface appearance quality; secondly, the 3D printed food package ink is molded at one time, and is simple in process and low in cost; thirdly, the 3D printed food package ink is free of pollution, and is relatively environment-friendly as the material can be recycled and reused after being retreated.