Pig launcher and receiver refer to process equipment designed to launch and receive pipe cleaner in fluid medium transport pipeline. Normally, the equipment is installed at both ends of pipeline or pressure regulating valve chamber along the pipeline. It is important equipment for oil and gas gathering and transportation, oil storage and transport, oil loading and unloading at ports, etc. The equipment is designed to clean pipeline, to remove slag, rust, to clean pipeline, to scrap wax, and to coat the surface of pipeline.