Abstract: Dyeing industry is a traditional labor-intensive industry and with high water-consuming. In China, the dyeing industry is concentrated in Zhejiang and Jiangsu province. Based on the conventional plate-and-frame pressure filtration technology, the sludge of a dyeing industrial park in Wuxi, Jiangsu Province was studied experimentally. According to the research results, a 40 t/d demonstration project of sludge dewatering by high-pressure plate-and-frame pressure filtration was built. All the sludge of the dyeing industrial park were centralized treated and filtered. Sludge water content was less than 60%, which was subsequently sent to coal-fired power plant as the raw material to achieve the purpose of sludge reduction and heat resource recycling. At the same time, the wastewater after pressure filtration process was discharged to the wastewater treatment plant after coagulation sedimentation and three dimensional electrocatalysis, without secondary pollution.