Backwater treatment technology is a highly challenging issue in the water treatment industry. The commonly used catalytic oxidation combined with NFRO process has fatal defects such as high operating costs, short membrane service life, and low water reuse rate. Our company has introduced the SMART process in coking wastewater treatment, successfully improving the shortcomings of traditional treatment processes, achieving true reuse of coking wastewater deep treatment, greatly reducing wastewater generation, and providing a foundation for absolute zero discharge. This process has dual benefits of social environmental protection and user economy. The SMART process is an excellent deep treatment process after the implementation of the new national coking industry admission standards. Our company will continue to explore and deepen cooperation with various coking enterprises, provide high-quality services to coking users, and make corresponding efforts to reduce environmental pollution in the coking industry.