there are manufacturing industries in Huai' an that cause serious environmental pollution. According to the relevant information, Huai 'an belongs to the northern part of Jiangsu Province. Relatively speaking, the proportion of industries with high technology content is relatively small, and most industries are manufacturing industries, which are relatively polluted. Small-scale enterprises or enterprises with low economic benefits will be unable to bear this cost, and the maintenance cost will be relatively high. Therefore, a considerable number of enterprises directly discharge untreated industrial wastewater into No.6 Middle School, causing serious water pollution.