Extracting　Cu　from　the　circuit　plank　sludge　with　sulfuric　acid　was　carried　out.　The　effects　of　reaction　time,　liquid-to-solid　ratio　and　the　volume　of　sulfuric　acid　on　the　extraction　rate　were　investigated.　The　experimental　results　show　that,　the　circuit　plank　sludge　has　a　high　concentration　of　Cu,　which　is　80.7mg/g　wet　sludge.　In　leaching　process,　the　Cu　extraction　rate　rises　at　first　and　then　declines　with　the　increase　of　solid-liquid　rate,　and　the　extraction　rate　can　reach　to　98.6%　when　the　solid　-　liquid　rate　is　5.　The　extraction　rate　increases　with　the　increase　of　reaction　time,　and　it　can　reach　to　98.4%　when　the　reaction　time　is　20min.　The　volume　of　sulfuric　acid　has　a　significant　impact　on　the　extraction　rate.　The　extraction　rate　of　Cu　rises　obviously　with　the　increase　of　the　volume　of　sulfuric　acid,　with　nearly　completely　leaching　when　the　volume　of　sulfuric　acid　is　4ml　for　5.0g　wet　sludge.　In　leaching　process,　Fe　and　Zn　in　the　circuit　plank　sludge　can　also　be　leached,　but　their　maximum　extraction　rate　are　low,　with　values　of　61.22%　and　24.43%　of　Fe　and　Zn,　respectively.　It　can　be　concluded　with　low　concentrations　of　Fe　and　Zn　in　circuit　plank　sludge　that　recovery　of　Cu　from　leaching　liquid　will　be　favorable　under　proper　conditions.