NOVELTY - Environment-friendly ink with biological activity comprises 0.5-0.8 pt. wt. triethanolamine borate, 0.1-0.2 pt. wt. cinnamon oil, 0.01-0.02 pt. wt. pig bile, 10-13 pts. wt. amino resin, 0.1-0.2 pt. wt. 600-mesh radium powder, 1-3 pts. wt. hydrogenated rosin, 12-14 pts. wt. organic silicone-modified polyamide resin, 8-13 pts. wt. environment-friendly pigment, 10-15 pts. wt. methyl acetate, 12-16 pts. wt. n-propyl acetate and 1-2 pts. wt. auxiliary agent.    USE - Environment-friendly ink with biological activity used for protecting substrate, providing insect repellent effect and antibacterial effect and air purifying.    ADVANTAGE - The environment-friendly ink with biological activity does not contain benzene and ketone solvent, has low toxicity, anticorrosive property, high antibacterial property, deodorization and sterilizing properties, excellent printability, good adhesion, faint scent, bright color, natural biological activity and good decorative effect, and is environment-friendly.    DETAILED DESCRIPTION - Environment-friendly ink with biological activity comprises 0.5-0.8 pt. wt. triethanolamine borate, 0.1-0.2 pt. wt. cinnamon oil, 0.01-0.02 pt. wt. pig bile, 10-13 pts. wt. amino resin, 0.1-0.2 pt. wt. 600-mesh radium powder, 1-3 pts. wt. hydrogenated rosin, 12-14 pts. wt. organic silicone-modified polyamide resin, 8-13 pts. wt. environment-friendly pigment, 10-15 pts. wt. methyl acetate, 12-16 pts. wt. n-propyl acetate and 1-2 pts. wt. auxiliary agent. The auxiliary agent comprises 4-5 pts. wt. propylene glycol phenyl ether, 5-8 pts. wt. oxidized polyethylene wax, 2-3 pts. wt. ethylene glycol dimethacrylate, 15-18 pts. wt. deionized water, 1-3 pts. wt. sodium dodecylbenzenesulfonate and 2-3 pts. wt. glycol monomethyl ether. It is prepared by heating oxidized polyethylene wax to melting state, dropwise adding ethylene glycol dimethacrylate while stirring at 800-1000 revolutions/minute, and keeping constant temperature for 20-30 minutes to obtain oxidized polyethylene wax-ethylene glycol dimethacrylate emulsion, mixing the rest raw materials and deionized water, completely dissolving by heating until boiling, and obtaining water phase solution, adding the oxidized polyethylene wax-ethylene glycol dimethacrylate emulsion and obtaining the product. An INDEPENDENT CLAIM is included for preparation of environment-friendly ink with biological activity comprising mixing cinnamon oil, pig bile and environment-friendly pigment, grinding for 20-30 minutes, adding the rest raw materials, high speed stirring for 30-40 minutes, adding the mixed material in grinder, grinding to particle size of less than or equal to 10 mu m, and obtaining the product.