This chapter provides a comprehensive review of sludge dewatering equipment used in water and wastewater treatment. It starts by describing the purpose and principles of sludge dewatering and summarizes current development trends in China and internationally. The chapter then presents a classification of typical sludge dewatering equipment, including vacuum drum filter dewatering machines, plate and frame filter presses, belt filter presses, centrifugal dewatering machines, screw press dewatering machines, and electro-osmosis dewatering machines. Each equipment type is discussed in terms of operating principles, process flow, construction, and main technical parameters, accompanied by relevant figures and tables. Integrated equipment for sludge thickening and dewatering is also introduced, covering belt and drum pre-concentration methods. The chapter emphasizes safety regulations for equipment operation and concludes with detailed analysis of common faults and troubleshooting strategies for sludge dewatering systems.