The PVC pipes in China have developed rapidly in recent years, and the annual growth rate is 8%, and the annual demand growth rate is 2%. In the plastic pipe, PVC pipe has been the amount of way ahead technology is relatively mature, in recent years, PVC water supply pipe in the product innovation investment is not big, new products on the market is relatively small, ordinary products, high technology, high value-added products, general products, intermediate products of similar high-end products accounted for the majority of less. The impact of the ban on the PVC-U pipeline should be envisaged. The negative impact of the regulations on the use of non lead salt heat stabilizers in PVC-U drinking water pipes on the PVC pipeline industry is greater. Although the relevant departments, industry associations and some production enterprises have made a lot of effort, held a special press conference, using the media publicity, the overall situation is gradually rational, but because some of the actual situation is still not very understanding, PVC-U drinking water consumption growth rate is less than the average level of growth, and also the potential negative effects exist the application of other PVC-U pipes. The expansion of application areas and market promotion needs to be improved. The application and matching technologies need further improvement, such as industry and product publicity, science popularization and so on, which are not in place, affecting the expansion of the rational use and application of plastic pipelines. The related work of the industry association remains to be improved, and the promotion and publicity should be strengthened. At present, the application market of products is also concentrated in a limited number of fields, as well as the opportunity to develop new application markets. The supporting technology of some products is not complete, and the standardization of the design, construction and acceptance of some products is lagging behind. The market is not standardized, some enterprises poor product quality, affecting the healthy development of the industry because of the plastic pipe market is still not standardized, some buyers are not end-user products, do not pay attention to the brand and quality, resulting in different quality products on the market at the same time, even some local quality products better sales price is low, and the PVC-U tube is more serious. It is understood that a variety of PVC-U production enterprises in a county area have more than 500, and most of them are family workshops, the quality of which can be imagined. The cost of PVC-U pipeline accounts for about 70% of raw material price. Individual businesses reduce product costs by reducing wall thickness and adding calcium carbonate and other products, resulting in poor quality of products. Other businesses use more than two different quality trademarks, use low-grade processing equipment, drinking water pipes and lead salt stabilizer to reduce costs, damage consumers' rights and interests, and destroy the credibility of the industry. The quality of construction should be further improved. The quality of PVC-U pipeline engineering is largely determined by the level of construction. Good products and good construction can ensure the good operation of pipeline system. Some engineers lack professional training. In practice, they follow the way of metal tube design and construction. There are irregular construction and barbaric construction. They fail to give full play to the technical and economic performance of PVC-U pipeline, and even cause pipeline damage. Some users still do not know how plastic pipes should be used in construction and supervision according to regulations. PVC resins and additives restricted the development of the industry in recent years, the plastic pipe led the development of related industries, but some of the PVC resin production enterprises upstream industries still exist in the quality of PVC resin is not stable, some regularity of PVC resin particles, some resin residue with high content of VCM, the special material pipeline less, some processing aids at present also the localization can not, some quality is not very stable, some performance is not up to the requirements, to further improve the performance of control pipeline products.