This chapter introduces the classification, typical layout, composition, overall design, main component structure, hydraulic system, control system, and selection of fixed horizontal waste compactors. Firstly, fixed horizontal waste compactors are classified into direct compaction and pre-compaction types based on container form. Secondly, typical layouts in waste transfer stations mainly include ground-level and underground (partially or fully) arrangements. Thirdly, the main composition covers the waste compactor, various feeder and feeding modes, and the docking between compactor and container. Fourthly, overall design involves the station layout, docking design, and determination of key parameters. Fifthly, the structural design of main components addresses the compactor itself, feeding equipment, unloading chute, container movement system, and container design. Sixthly, the hydraulic system is detailed in terms of its function, components, and design considerations. Seventhly, the control system includes both field and central control systems. Finally, the selection principles and procedures for fixed horizontal waste compactors are introduced, along with recommended models and a calculation example for an 800-ton waste transfer station, including the detailed operational flow based on the arrangement of waste collection vehicles, transportation vehicles, and compaction equipment.