The utility model provides a production device for curled polyester filament, which consists of a polyester spinning machine nozzle, polyester filament, a polyester filament grouping device, a blower, an air heater, a hot air nozzle and a silk cake winding machine. A blower, an air heater and a hot air nozzle form a hot air directional heater, one end of the polyester filament is connected with the nozzle of a polyester spinning machine, and the other end is connected with a silk cake winding machine. The polyester filament grouping device is arranged between polyester filaments to divide them into two groups, and the hot air nozzle blows air 32 relative to one group of tows. The polyester tows heated by hot air blowing are mixed with other groups of polyester tows that are not heated by hot air blowing, wound into textile cakes, sent to a loom to weave into fabrics, and soaked in hot water at 60- 128℃ to naturally curl the tows or fabrics. Compared with the prior art, the invention has the characteristics of reasonable design, less equipment investment and easy implementation, and the produced polyester filaments and woven fabrics have the characteristics of natural curling, thus having good popularization and use value.