Environment-friendly cooking-resistant composite ink and preparation method thereof

The invention discloses environment-friendly cooking-resistant composite ink and a preparation method thereof, and belongs to the technical field of ink, and the environment-friendly cooking-resistant composite ink comprises the following components in percentage by weight: 3-15% of ethyl acetate, 3-15% of n-butyl acetate, 3-10% of isopropanol, 25-40% of polyurethane resin, 8-35% of pigment, 15-30% of cellulose acetate butyrate resin liquid, 0.5-2% of auxiliaries and the balance of n-propyl acetate. The composite ink has excellent adhesive force and boiling resistance, has good adhesive force on treated BOPP, PE, PET and BOPA film substrates, is not easy to block in the printing process, has good resolubility, good dot reproducibility and good film-forming property, has good adhesive property, can be subjected to heat sealing operation at 180 DEG C for 0.5 second, can be boiled at 121 DEG C for 30 minutes, and has the advantages of high temperature resistance, high temperature resistance and high temperature