The invention provides a manufacturing method of washable non-curling knitting collars and cuffs. The knitting collars and cuffs comprise piece dyeing knitting collars and cuffs and yarn dyeing knitting collars and cuffs; for the piece dyeing knitting collars and cuffs, the method comprises the following steps of knitting, boiling off, enzyme washing, dyeing, squeezing and drying, mercerizing by liquid ammonia, neutralizing, softening, squeezing and drying, soaking in resin, collar rolling and pre-drying, baking, and collar removal; for the yarn dyeing knitting collars and cuffs, the method comprises the following steps of knitting, water washing and oil removal, enzyme washing, squeezing and drying, mercerizing by liquid ammonia, neutralizing, softening, squeezing and drying, soaking in resin, collar rolling and pre-drying, baking, and collar removal. The knitting collars and cuffs manufactured by the method have the advantages that the hand feel is soft after mercerizing by the liquid ammonia, the rebounding property, strength, size stability and washability are obvious improved, the deformation and curling of the collars and the cuffs are avoided after 20 times of water washing, and the good rebounding property is realized; the color change and the fuzzing and pilling resistance respectively reach more than level 4.