Biological ink material for 3D printing and preparation method and application thereof

The invention discloses biological ink material for 3D printing and a preparation method and application thereof. The biological ink material is prepared by, by mass concentration percentage, 5-18% of biological macromolecules, 76-93.5% of water or 76-93.5% of pre-crosslinking agent, and 1.5-6% of coagulant, wherein the sum of the mass concentration percentage of the above raw materials is 100%. The biological ink material is characterized in that water washing and crosslinking are performing for shaping after printing. The biological ink material has the advantages that the biological ink material can be easily squeezed out during printing, does not block printing needles and can be easily shaped after being squeezed out; the biological ink material is low in antigenicity in the bodies of organisms, low in caused rejection reaction, biodegradable, nontoxic to the organisms and high in safety.