Abstract: Printed circuit boards ( PCB) are the core part of electronic waste，and a huge number of waste PCB generated every year． The typical PCB contains about 30% metal in weight． Different electric and electronic equipment has different function． In this paper different waste PCBs including computers，cellphones，hard disks and industrial controller were dismantled． This paper provided the contrast analysis of the metal content of waste PCB and their potential value． The waste PCB was removed from components on PCB． Kinds and content of metals varied in different waste PCB． The potential value of industrial controllers and hard disks was 800 000 yuan per ton，larger than computers and cellphones． The content of common metals especially copper was about 20 kg /t，and mainly concentrated in the removal of components circuit board．