Textured yarn with different shrinkage and excellent suede effect and method for preparing the same

A method for preparing a textured yarn(ATY) with different shrinkage and excellent suede effect by air-texturing an effect yarn and core yarn, wherein at least one or two kinds of two-component composite yarn(A) is fed as the effect yarn into an air texturing nozzle(3) at an over feed rate of 10 to 60% through the first feed roller(1), the two-component composite yarn(A) consisting of a fiber forming component and an extraction component or consisting of at least two kinds of fiber forming components and having a monofilament fineness of 0.001 to 0.3 denier after dividing or extracting the extraction component, at the same time, a thermoplastic multifilament yarn(B) is fed as the core yarn into the air texturing nozzle(3) at an overfed rate of 5 to 55% through the second feed roller(2) while supplying water to a water supply device(4) disposed between the second feed roller(2) and the air texturing nozzle(3), and then the effect and core yarns are air-textured by an air pressure of 6 to 16 kgf/cm2 in the air texturing nozzle(3), heat-treated at a temperature of 130 to 210° C. in a hollow heater(6) in a state that the overfeed rate is 0 to −8% and wound in a state that the overfeed rate is −2 to −12%.