Flocculation-deposition and hy drolysis-acidification and aerobic processes are used for the treatment of dyeing waste water f rom superfine fibre fabric, through hydrolysis-acidification and keep C∶N∶P in the right proportion, the biodegradability of dyeing wastewater is improved successfully.Af ter running over a year, the operation results of this system show that the effluent reaches the standard of emission control regulations steadily.