Circuit board recycling equipment (high voltage electrostatic separation type) adopts a process route that makes raw materials such as printed circuit boards to be a mixture of metal and resin fiber powder by dry crushing and pulverization and then separates the metals from the non-metal materials such as resin by high voltage electrostatic separator. To avoid dust pollution in the process, the equipment also uses the three-in-one dust removal equipment independently developed by the company. This dust removal equipment has three-stage dust removal: cyclone dust removal, bag dust removal and dust removal by air cleaner. All of these effectively solve the problem of dust pollution with every index up to the national standard.