3D printing ink and preparation method thereof

The invention provides 3D printing ink and a preparation method thereof, and relates to the technical field of 3D printing. The preparation method of the 3D printing ink comprises the following steps of: S1, adding a nano polymer modifier, an emulsifier and water into a container to prepare a dispersion liquid; S2, transferring the dispersion liquid prepared in the step S1 into a reactor, adding raw latex into the reactor, and stirring to obtain modified latex; and S3, adding the modified latex prepared in the step S2, nano tackifying resin, a nano reinforcing agent, a nano filling agent, a nano plasticizer, a nano anti-aging agent, a nano active agent, a nano accelerant and a nano vulcanizing agent into a solvent to prepare the 3D printing ink. The 3D printing ink prepared by the preparation method of the 3D printing ink provided by the invention has the characteristics of uniform nanoscale dispersion, high strength, high compactness and good toughness, can be applied to printing of high-precision and high-t