The invention relates to a waste polyester high-value circulation reuse technique, and in particular to a method for preparing a high-quality melt through alcoholysis of a waste polyester textile with ethylene glycol. The method for preparing the high-quality melt through alcoholysis of the waste polyester textile with ethylene glycol comprises the following steps: adding ethylene glycol which accounts for 1-8% of the mass of a raw material into a screw extruder for mixing melt extrusion, and feeding the material into a hardening and tempering device, wherein the melt viscosity of the melt extruded from the screw extruder is 0.40-0.50dl/g; the melt viscosity of the melt discharged from the hardening and tempering device is 0.620-0.685dl/g. Due to adoption of a proper amount of the ethylene glycol, the melt viscosity can be improved, meanwhile, the problems that a filter is short in cycle and a vacuum system is large in maintenance workload can be effectively solved, the production cost can be lowered, and meanwhile, the additional value of a product can be increased.