With the widespread use and rapid updating of electronic devices, the number of waste circuit boards is increasing day by day. These waste circuit boards contain a large amount of metals, plastics, and valuable rare metals. If they can be effectively recycled, it will not only reduce environmental pollution but also achieve sustainable utilization of resources. The emergence of water selection recycling equipment for waste circuit boards provides an efficient and environmentally friendly solution for the recycling of waste circuit boards. The water selection recycling equipment for waste circuit boards is mainly composed of a feeding system, a crushing system, a screening system, a washing system, a flotation system, a concentration system, and a drying system. Firstly, the feeding system evenly feeds the waste circuit boards into the equipment. The crushing system crushes the circuit boards into smaller particles for subsequent processing. The screening system can sort the crushed circuit board particles by size and remove the larger impurities. The washing system is one of the key parts of the entire equipment. During the washing process, the buoyancy and impact force of water are used to separate the metals and plastics from the circuit boards. The metal particles will sink to the bottom of the water, while the plastic and other impurities will float on the surface of the water, thus achieving initial separation. The flotation system further improves the recovery rate of metals. By adding flotation reagents, a hydrophobic layer is formed on the surface of the metal particles, making them easier to be flotated. After being processed by the flotation system, the purity of the metals is significantly improved. The concentration system concentrates the flotation slurry to remove most of the water, making the metal particles more concentrated. Finally, the drying system dries the concentrated metal particles to meet the standards for sale. The water selection recycling equipment for waste circuit boards has many advantages. Firstly, it adopts the method of water selection, which is environmentally friendly and will not produce pollutants such as exhaust gas and waste residue. Secondly, the equipment has a high degree of automation and can achieve continuous operation, improving production efficiency. In addition, it also has the advantages of high recovery rate and good product quality, which can effectively recycle the metal resources in waste circuit boards. However, the water selection recycling equipment for waste circuit boards also faces some challenges. For example, the composition of waste circuit boards is complex, containing a large number of organic substances and harmful substances, which need further processing and purification. In addition, the investment cost of the equipment is high, and it is necessary to further reduce the cost and improve the cost-performance ratio of the equipment. The water selection recycling equipment for waste circuit boards is an innovative path of environmental protection and resource recycling. It provides an efficient and environmentally friendly solution for the recycling of waste circuit boards and has broad application prospects. With the continuous progress and improvement of technology, it is believed that the water selection recycling equipment for waste circuit boards will play a more important role in the future field of resource recycling.