PCB surfaces are generally coated with a layer of paint to protect the metal, and the paint should be removed before recycling. There are two types of paint removers: organic paint removers and alkaline paint removers. Organic paint removers have high toxicity and pose great harm to human health and the environment, while alkaline paint removers have relatively low toxicity. We obtained the optimal formula for paint removal through experiments: place the cut PCB chips into a 10% sodium hydroxide solution. Adding 0.5% additive A, 0.5% additive B, and 0.05% corrosion inhibitor mercaptobenzotriazole, heating in a water bath can completely remove the surface paint within 30 minutes, further recovering the exposed metal. Alkaline paint stripping is the separation of paint from the contact area of the circuit board. The paint mainly exists in its original structure and can be recycled.