In today's rapidly developing technology era, the pace of electronic product updates and replacements is increasingly fast, and the number of waste circuit boards generated is also increasing. Waste circuit boards contain a large amount of heavy metals, rare metals, and other recyclable materials, but they also contain harmful substances. If not handled properly, it will not only cause a great waste of resources, but also cause serious pollution to the environment. The emergence of a complete set of water selection equipment for recycling waste circuit boards has brought new hope to solving this problem. The complete set of water selection equipment for recycling waste circuit boards is a comprehensive device that integrates a variety of advanced technologies. It mainly consists of a crushing system, a water selection system, and a separation system. First, the crushing system conducts preliminary crushing of the waste circuit boards, turning them into particles of suitable sizes. This step is crucial, as it lays the foundation for subsequent water selection and separation work. Next, the water selection system plays a key role. Under the action of water buoyancy and water flow, substances of different densities will stratify. The metals and non-metallic substances in the circuit boards will naturally separate in the water selection tank due to their different densities. The metal substances are heavier and will settle at the bottom of the water, while the non-metallic substances will float on the water surface or be carried to specific areas by the water flow. This water selection method is not only efficient, but also environmentally friendly, avoiding the pollution problems caused by the use of chemical agents in traditional recycling methods. The separation system further conducts fine separation of the substances after water selection. It can sort different kinds of metals, such as copper, aluminum, and iron, making the recycled metals more pure and more valuable for reuse. At the same time, the separated non-metallic substances can also be further processed and utilized to maximize resource recovery. The application of the complete set of water selection equipment for recycling waste circuit boards has significant economic and environmental benefits. From the economic perspective, it can recover a large number of valuable metals and other substances from waste circuit boards, which can be re-used in industrial production, reducing production costs and improving resource utilization. From the environmental perspective, it avoids the pollution caused by the random disposal and irregular processing of waste circuit boards to soil, water, and air, protecting the ecological environment. However, at present, the promotion and application of the complete set of water selection equipment for recycling waste circuit boards still face some challenges, such as high equipment costs and the need for further improvement of some technologies. But with the continuous progress of technology and the improvement of people's environmental awareness, I believe these problems can be gradually solved. The complete set of water selection equipment for recycling waste circuit boards will certainly play an increasingly important role in the field of resource recycling and create a more green and sustainable future for us.