A　novel　wastewater　purification　material　was　prepared　by　a　hydrothermal　method.　It　was　mainly　made　from　oyster　shells　with　the　merits　of　long　service　time,　large　surface　area,　high　lead　removal　efficiency　and　excellent　recyclable　properties.　The　technological　conditions　were　decided　respectively　based　on　the　lead　removal　efficiencies.　At　pH　=　5　and　30　degrees　C,　for　the　wastewater　with　the　initial　concentration　of　Pb(2+)　to　be　5　mg/L,　adsorption　time　24　h,　and　1　mg　to　40　mL　of　mass　ratio　between　adsorbent　and　Pb(2+),　the　maximum　adsorption　capacity　can　reach　0.19　mg/g.　The　lead　removal　material　prepared　by　hydrothermal　method　has　excellent　recycle　performance.　The　equilibrium　adsorption　capacity　can　get　to　9.71　mg/g　and　the　average　Pb(2+)　removal　rate　is　as　high　as　66.39%.　After　reusing　for　60　times,　the　SEM　observation　shows　that　the　hydrates　of　reticular　formation　is　formed　after　hydrothermal　modification,　which　provides　a　good　attachment　position　for　Pb(2+),　indicating　the　physical　adsorption　is　dominant.