1. The results of the invention belong to the scientific field of environmental pollution control and governance, and belong to the discipline direction of environmental engineering. 2. The main contents and characteristics of the results of the invention: Aiming at the utilization of high value-added resources of multi-metallic industrial waste, the technical path is to develop and prepare high-efficiency environmental catalysts. Aiming at the coexistence of multi-metallic components of industrial waste such as slag and heavy metal sludge and have environmental catalytic utilization properties, we track the development frontier of international environmental catalytic materials. This achievement establishes a methodology for using multi-component metallic inorganic industrial waste to prepare new materials for catalytic decomposition of environmentally polluting gases. A number of key technologies and process routes have been formed for the industrial application of commercial catalysts for the preparation of polymetallic industrial waste. Key results include: 1. Invented a technical system for preparing amorphous glassy dispersion-loaded NOx and VOC catalytic materials with MnCr by using metallurgical manganese slag to coordinate electroplating chromium-containing wastewater, and obtained an authorized patent; For the first time, a step-by-step precipitation method was used to control the microstructure disintegration of manganese slag and high-temperature slag. MnFe@SiO2 molecular sieve supported catalyst was formed through dissolution and precipitation. An invention patent was applied. Empirical application has confirmed that after the slag-derived catalyst is activated by high-temperature hydrothermal, the surface forms a short-range ordered crystal catalytic structure, and its hydrothermal resistance is better than that of commercial catalysts; 2. Invented a new NOx-SCR and VOC catalytic material system that uses MOFs synthesis method to regulate the component structure of electroplating sludge and uses pyrolysis process to prepare transition metal-supported graphene-like core-shell characteristic structures, and obtained authorized patents; invented a technical system for matching and controlling electroplating wastewater and electroplating sludge components to form ferrite composite oxide catalysts, and obtained two authorized patents;3. Based on the innovative ideas of the above-mentioned invention patents, high-efficiency catalyst products derived from multi-metal electroplating sludge-derived FeCuNiCr-supported graphene-like and Mn-slag-Cr wastewater derived from laboratory, pilot and large-scale pilot production are close to those of noble metal catalysts, and their NOx reduction catalytic performance is better than that of commercial Vi/Ti catalysts;4. The industrially prepared catalyst products have the characteristics of a new honeycomb porous structure, which has the characteristics of longer high temperature residence time than traditional honeycomb catalyst structures, which is conducive to improving the catalytic decomposition efficiency of polluting gases. Invention patents have been applied for;5. Published 12 SCI papers in academic journals at home and abroad, including 7 papers in the first district, and 4 papers in EST, a top journal in the environmental field, with a total citation rate of more than 270 times; 6. This project has obtained 6 authorized patents and applied for 4 patent review projects;7. The preparation cost of catalyst products is 1/15 of that of similar precious metal products; 1/6 of similar transition metal products;8. After inquiry, there have been no relevant reports on the innovation points of this achievement at home and abroad. III. The application and promotion of the invention are as follows: 1. The results of the invention have used manganese slag to prepare 20 cubic meters of commercial NOx and VOC catalysts;2. The catalyst has been first carried out in the SCR environmental protection project of Jiangsu Fengfeng Hongyun Environmental Protection Technology Development Co., Ltd. It has been stable for nearly one year, during operation, the NOx decomposition efficiency is 98%, and the NOx concentration is below 10mg/m3, reaching the national emission standard; 3. The catalyst has been demonstrated and applied in three environmental protection projects of VOC catalytic combustion of Shanghai Hujia Environmental Protection Technology Co., Ltd. It has passed nearly a year of stable operation. The decomposition efficiency of non-methane total hydrocarbons of the device is 95%. The export non-methane total hydrocarbons concentration is below 8mg/m3, and no benzene was detected in the exhaust gas. The average concentration of toluene is less than 4.2 mg/m3, and the average concentration of xylene is 5.7 mg/m3, meeting the national emission standard.