Abstract: Aiming at the problems existing in traditional cold pad-batching bleaching such as long dwell time and high consumption of alkali,application of H₂O₂/NOBS activating system in cotton fabric cold pad-batch bleaching is proposed.The influence of process conditions on the bleaching effect was investigated through single factor analysis and orthogonal experiments,and the activating bleaching mechanism was discussed.And complete application technology of H₂O₂/NOBS activating bleaching has been developed.The optimal conditions are as follows: H₂O₂concentration,30 g/L;the mol ratio of NOBS to H₂O₂,1∶4;NaOH mass concentration,6 g/L;piling time,6 h.The results show that the activator bleaching process has the advantages of improving the quality of the bleached fabric,eco-friendly and energy-saving.It remarkably decreases alkali consumption and shortens the piling time.