The invention provides a destroying treatment system for scrapped circuit boards, and belongs to the technical field of solid waste treatment. The destroying treatment system for scrapped circuit boards comprises a crushing subsystem, a screening subsystem, a purifying subsystem, a material conveying subsystem and a control subsystem. Scrapped circuit boards enter the crushing subsystem to be crushed, crushed mixtures enter the screening subsystem to be screened and recovered, dust and waste are discharged according to the standard after being treated through the purifying subsystem, the material conveying subsystem is used for conveying materials, and the control subsystem controls the crushing subsystem, the screening subsystem, the purifying subsystem and the material conveying subsystem, so that automatic conveying, crushing, screening and purifying are achieved. The destroying treatment system is used for safe, pollution-free and harmless decomposition and destroying of scrapped circuit boards, valuable elements are recovered, and the national emission standard is met.