▎ 摘　　要

NOVELTY - Three-dimensional printing bio-based copolyester comprises aliphatic polyester, unsaturated polyester and auxiliary agent. The unsaturated polyester is polytrimethylene fumarate. USE - Three-dimensional printing bio-based copolyester ADVANTAGE - The three-dimensional printing bio-based copolyester has good biodegradability, can be rapidly decomposed and degraded after use, avoided damage to the environment, complied with environmental protection requirements, and great promotion value and use significance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing three-dimensional printing bio-based copolyester, which involves: performing melt extruding the prepared raw material under the condition that the temperature of the twin-screw extruder is 150-190degrees Celsius to obtain a wire rod; and irradiating the obtained wire rod with light to obtain three-dimensional printing bio-based polyester.