Sewage treatment is also the top priority of the country, and it can better promote the development of our country in the sewage treatment industry. Before this, the sewage treatment work in our country can be said to be a blank period compared with the situation of sewage treatment in developed countries. But now our country has increased its investment in the sewage treatment industry. The application of electromagnetic flowmeters in wastewater treatment can explain the scientific and technological progress of our country in this respect, and the increase of environmental protection in our country. Our country is gradually aware of the destruction of the environment, which has seriously affected the beautification of the city and the physical and mental health of the public. In the past, we have been pursuing economic development and neglecting the significance of environmental protection, so now it will be very difficult for environmental governance. At present, our country has increased the investment in science and technology in environmental management, resulting in many environmental protection technology products. The anti-corrosion sewage flow meter is a very good representative.