A manufacturing method of a recycling nylon fiber (100, 200), comprising: providing a nylon fiber waste (110, 210), wherein the nylon fiber waste is an oiled nylon 6 fiber waste or an oiled nylon 66 fiber waste; performing a cutting step (120, 220), wherein the nylon fiber waste is cut so as to form a plurality of nylon fiber debris; performing a washing step (130, 230), wherein the nylon fiber debris are washed so as to reduce an oil content of the nylon fiber debris to less than 0.22 wt%; performing a dehydrating and squeezing step (140, 240), wherein moisture of the nylon fiber debris is removed so as to form a plurality of nylon films, and a moisture content of the nylon films is less than or equal to 4 wt%; performing a melting and granulating step (150, 250), wherein the nylon films are melted and granulated so as to form a plurality of recycling nylon particles; and performing a melting and spinning step (160, 270), wherein the recycling nylon particles are melted and spun so as to obtain the recycling nylon fiber, and the melting and spinning step comprises: performing a melting step, wherein the recycling nylon particles are melted so as to form a spun liquid; performing a fiber spitting step, wherein the spun liquid is passed through a spinneret plate so as to form a plurality of nascent fibers; performing a cooling step, wherein the nascent fibers are cooled so as to form a plurality of solidified fibers; performing a collecting and oiling step, wherein the solidified fibers are collected and oiled so as to form a bundled fiber; performing a drawing step, wherein the bundled fiber is drawn so as to form a stretched fiber, and a draw ratio of the drawing step ranges from 1.2 to 1.5; and performing a winding step, wherein the stretched fiber is wound around a cylindrical element so as to obtain the recycling nylon fiber. providing a nylon fiber waste (110, 210), wherein the nylon fiber waste is an oiled nylon 6 fiber waste or an oiled nylon 66 fiber waste; performing a cutting step (120, 220), wherein the nylon fiber waste is cut so as to form a plurality of nylon fiber debris; performing a washing step (130, 230), wherein the nylon fiber debris are washed so as to reduce an oil content of the nylon fiber debris to less than 0.22 wt%; performing a dehydrating and squeezing step (140, 240), wherein moisture of the nylon fiber debris is removed so as to form a plurality of nylon films, and a moisture content of the nylon films is less than or equal to 4 wt%; performing a melting and granulating step (150, 250), wherein the nylon films are melted and granulated so as to form a plurality of recycling nylon particles; and performing a melting and spinning step (160, 270), wherein the recycling nylon particles are melted and spun so as to obtain the recycling nylon fiber, and the melting and spinning step comprises: performing a melting step, wherein the recycling nylon particles are melted so as to form a spun liquid; performing a fiber spitting step, wherein the spun liquid is passed through a spinneret plate so as to form a plurality of nascent fibers; performing a cooling step, wherein the nascent fibers are cooled so as to form a plurality of solidified fibers; performing a collecting and oiling step, wherein the solidified fibers are collected and oiled so as to form a bundled fiber; performing a drawing step, wherein the bundled fiber is drawn so as to form a stretched fiber, and a draw ratio of the drawing step ranges from 1.2 to 1.5; and performing a winding step, wherein the stretched fiber is wound around a cylindrical element so as to obtain the recycling nylon fiber. performing a melting step, wherein the recycling nylon particles are melted so as to form a spun liquid; performing a fiber spitting step, wherein the spun liquid is passed through a spinneret plate so as to form a plurality of nascent fibers; performing a cooling step, wherein the nascent fibers are cooled so as to form a plurality of solidified fibers; performing a collecting and oiling step, wherein the solidified fibers are collected and oiled so as to form a bundled fiber; performing a drawing step, wherein the bundled fiber is drawn so as to form a stretched fiber, and a draw ratio of the drawing step ranges from 1.2 to 1.5; and performing a winding step, wherein the stretched fiber is wound around a cylindrical element so as to obtain the recycling nylon fiber.