Abstract: According to the character of waste acid, the technology of depuration by deoxidizing and extraction by combining TPB with p204 was used to reclaim indium and silve form waste acid, the crude indium was obtained by removeing impurities, replacing and melting from wash solution, the content of indium was over 98 % and the total recovery of indium was over 93 %. At the same time, the crude silver was obtained too. The content of silver was over 99 % And the total recovery of silver was over 90 %.