Pipeline pig is to use gas, liquid or pipeline transmission medium to push forward and carry other auxiliary equipment to complete various auxiliary pipeline operations. According to the different media and uses in the pipeline, the pigging device with different configurations is selected. The accessories for the pig are as follows: polyurethane foam cleaner, mechanical pigging, wire brush pipe pigging, pipeline pigging, electronic tracking pipeline pigging (magnetic flux leakage detection pig), scraping pipe cleaning pig and so on. Most pigging purposes are divided into cleaning and isolation. Among them, ball type (i.e. pigging ball) and cup type are the two most common types. The utility model has the advantages of strong practicability, convenient operation, low manufacturing cost and good flexibility for right angle pipeline. The cup type pig is mainly used for the decoking cleaning of water transmission pipeline, oil pipeline and boiler pipeline.