The invention discloses a production technique of three-dimensional curly hollow polyester staple fibers, wherein the production technique comprises the steps of: utilizing regenerative PET material as raw material; sequentially performing the following procedures to obtain a finished product: pre-treating, drum drying, melting spinning, cooling forming, winding, stretching, curling, oiling, cutting and heat setting, wherein the drum drying duration is 9.5-10.5 h, a spinneret plate in the melting spinning procedure is three-dimensional hollow helical, the cross section of a spinneret orifice is a sealed space formed by sealing the circular arcs of two concentric circles, the temperatures of the threaded rod of a threaded rod extruding machine and the box body of a spinning box are 265-275 DEG C; a circular air blowing asymmetrical cooling forming mode is utilized, the circular blowing blast temperature is 20-24 DEG C, and the circular blowing wind speed is 4.7-5.7 m / s; the total stretching fold is 2.5-2.7 folds, the main curling pressure of a curling wheel is 0.05-0.1 MPa, and no backpressure exists; the heat setting temperature is 175-180 DEG C, and the heat setting duration is 10-14 min. The production technique of the invention has the advantages of saving the cost and protecting the environment, and the prepared finished product not only has good three-dimensional configuration and bulkiness, but also has better thermal stability.