Affected by the COVID-19 epidemic, the global steel market is in a downturn, which leads to the phenomenon of overcapacity of furnaces in steel enterprises. Iron and steel enterprises have the surplus capacity to mobilize high-temperature furnaces to cooperatively dispose solid wastes, other industrial solid wastes and urban hazardous wastes generated within enterprises, which can not only reduce the pressure of environmental protection in the region, but also improve economic benefits. In this paper, the existing high-temperature furnaces of long-flow stainless steel enterprises such as sintering machines, blast furnaces, steelmaking furnaces, rotary kilns and other typical long-flow stainless steel enterprises are taken as examples, and scenarios for co-processing hazardous waste process in steel high-temperature furnaces are put forward, including sintering machine co-processing hazardous waste technology, blast furnace co-processing hazardous waste technology, rotary kiln processing zinc-containing dust process technology, and steelmaking kiln co-processing hazardous waste technology. In the new period of the 14th Five-Year Plan, by developing effective solid waste disposal technology, the cleaner production of long-flow stainless steel enterprises will be promoted, the linkage of regional circular economy will be promoted, the economic, social and environmental benefits of iron and steel enterprises will be promoted, and a low-cost way for hazardous waste disposal industry in China will be provided.