As the process of industrialization accelerates, finding effective methods for industrial wastewater treatment has become an important task in the field of environmental protection. However, despite the preparation methods and properties of biochar have been studied, its large-scale application in industrial wastewater treatment has not yet been fully understood and clarified. This paper first analyzes the industrial wastewater to be treated, and combines the mechanism of biochar in treating industrial wastewater, elaborates the cases of biochar applied in real life and the corresponding difficulties. The research results show that biochar is a material with good application potential for industrial wastewater treatment. Its high specific surface area and rich surface functional groups give it good adsorption capacity for various pollutants in industrial wastewater. In addition, the adsorption performance of biochar can be optimized by adjusting its preparation and application conditions. Future research should further explore the long-term stability of biochar in the treatment of industrial wastewater, as well as its application effect in the actual industrial environment. In addition, the development of efficient, economical, and controllable technologies for the preparation and application of biochar, and promoting its large-scale application in industrial wastewater treatment, are also important directions for future research. The research in this paper is of great significance for understanding and utilizing biochar for the treatment of industrial wastewater. The results not only help to improve the efficiency and effectiveness of industrial wastewater treatment, but also provide new ideas and methods for the high-value utilization of waste biomass. Therefore, this research has important theoretical and practical value for promoting the development of industrial wastewater treatment technology and achieving sustainable utilization of environmental protection and resources.