The invention relates to a high-value recycling technologies for waste polyester, in particular to a polyester spinning method for waste polyester textile raw materials by means of micro-alcoholysis. The polyester spinning method includes adding the raw materials and alcohol into a screw extruder and carrying out blending melting extrusion on the raw materials and the alcohol to obtain melt; feeding materials into a conditioning and viscosity regulating device to obtain melt; carrying out polyester spinning on the melt discharged from the conditioning and viscosity regulating device to obtain polyester staple fibers. The weight of the alcohol accounts for 1-8% of that of the raw materials. The melting viscosity of the melt discharged from the screw extruder is 0.40-0.50 dl/g. The melting viscosity of the melt discharged from the conditioning and viscosity regulating device is 0.635-0.685 dl/g. The polyester spinning method has the advantages that an appropriate quantity of the alcohol is added into the screw extruder, accordingly, the viscosity of the melt can be improved, problems of short cycles of filters and high maintenance workload of vacuum systems can be effectively solved, the production cost can be reduced, and additional value of products further can be increased.