High-viscosity polyester powder for 3D printing and preparation method thereof

The invention provides a high-viscosity polyester powder for 3D printing and a preparation method thereof. The polyester is aromatic polyester represented by formula (I). Intrinsic viscosity of the polyester is more than 5.50 dL/g. The high-viscosity polyester has characteristics of good mechanical strength, large melt strength and high thermal deformation temperature. The high-viscosity polyester is simple in production process and is easy to industrially produce.