▎ 摘　　要

NOVELTY - A coating liquid preparing method involves adding the fluorinated graphene to the perfluoroalkane as a solvent, and ultrasonicating at room temperature for 15-30 hours, adding perfluoroalkane with polytetrafluoroethylene, where the fluorinated graphene to the perfluoroalkane at a ratio of 0.1-0.6 g/ml, and PTFE to the perfluoroalkane at a ratio of 1-30 g/ml, and stirring at 300-400 degrees C for 12-24 hours to obtain the finished product. USE - Method for preparing coating liquid for endovascular stent surface. ADVANTAGE - The method enables preparing coating liquid with high elasticity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing a PTFE multi-channel intravascular stent, which involves selecting a frame body, where the frame body is metal mold or blood vessel support by using three-dimensional printing, and injecting the coating liquid into a syringe controlled by a micro syringe pump, and ejecting the coating liquid from the tip of the syringe by an electrostatic force, electro spinning the frame body, and attaching the surface of the frame body with a PTFE film to obtain the finished product.