A method for separating C4 olefins from a mixture gas of C4 olefins/paraffins by carrying out repeated sequential adsorbing, rinsing, and desorbing in a such way of performing displacement desorption using desorbents, in a separating apparatus of plurality of adsorption towers (AD-1, AD-2 and AD-3) loaded with adsorbents which selectively adsorb olefins and two distillation towers which are one distillation tower for the separation of olefins/desorbents and another distillation tower for the separation of paraffins/desorbents, the method comprising: adsorbing olefins by introducing the mixture gas of C4 olefins/paraffins into the adsorption towers (AD-1, AD-2 and AD-3) loaded with adsorbents and discharging non-adsorbed paraffins and the desorbents retained in the adsorption towers (AD-1, AD-2 and AD-3) at the desorption step to the outlet of the adsorption towers (AD-1, AD-2 and AD-3) and then discharging them to the distillation tower that separates paraffins and desorbents; rinsing with C4 olefin to increase the purity of olefins by introducing a portion of high purity C4 olefins resulting from the distillation process of olefins/desorbents into the adsorption towers (AD-1, AD-2 and AD-3) after the completion of the adsorption and cleaning a small amount of paraffins adsorbed together with olefins; and desorbing C4 olefins by introducing desorbents into the adsorption towers (AD-1, AD-2 and AD-3) after the completion of the rinsing and discharging the mixture of olefins/desorbents to the distillation tower that separate olefins and desorbents to produce high purity olefins, wherein said sequential adsorbing, rinsing and desorbing steps are repeatedly performed in that order, wherein each of the adsorption towers (AD-1, AD-2 and AD-3) is operated to perform different steps with respect to each other at the same time, and wherein the mixture of olefins/desorbents discharged from the desorbing step is introduced into the distillation tower for the separation of olefins/desorbents to obtain high purity olefins by distillation in the distillation tower and the mixture of paraffins/desorbents discharged from the adsorbing step is introduced into the distillation tower for the separation of paraffins/desorbents to separating paraffins and desorbents. adsorbing olefins by introducing the mixture gas of C4 olefins/paraffins into the adsorption towers (AD-1, AD-2 and AD-3) loaded with adsorbents and discharging non-adsorbed paraffins and the desorbents retained in the adsorption towers (AD-1, AD-2 and AD-3) at the desorption step to the outlet of the adsorption towers (AD-1, AD-2 and AD-3) and then discharging them to the distillation tower that separates paraffins and desorbents; rinsing with C4 olefin to increase the purity of olefins by introducing a portion of high purity C4 olefins resulting from the distillation process of olefins/desorbents into the adsorption towers (AD-1, AD-2 and AD-3) after the completion of the adsorption and cleaning a small amount of paraffins adsorbed together with olefins; and desorbing C4 olefins by introducing desorbents into the adsorption towers (AD-1, AD-2 and AD-3) after the completion of the rinsing and discharging the mixture of olefins/desorbents to the distillation tower that separate olefins and desorbents to produce high purity olefins, wherein said sequential adsorbing, rinsing and desorbing steps are repeatedly performed in that order, wherein each of the adsorption towers (AD-1, AD-2 and AD-3) is operated to perform different steps with respect to each other at the same time, and wherein the mixture of olefins/desorbents discharged from the desorbing step is introduced into the distillation tower for the separation of olefins/desorbents to obtain high purity olefins by distillation in the distillation tower and the mixture of paraffins/desorbents discharged from the adsorbing step is introduced into the distillation tower for the separation of paraffins/desorbents to separating paraffins and desorbents.