Water　hyacinth　is　an　invasive　plant　which　breeds　very　quickly.　It　had　led　to　many　adverse　environmental　events　such　as　river　blockages　and　fish　endangerment.　This　study　used　microwave　to　pyrolysis　water　hyacinth　and　activate　it　to　produce　heavy　metal　absorbent　and　improve　the　removal　of　Pb(　II　).　Compared　with　conventional　method,　it　simplify　the　produce　process,　As　the　dose　increased　to　0.25g,　the　absorption　efficiencies　of　two　absorbents　all　achieved　to　nearly　100%.　The　results　indicated　that　the　adsorption　ability　of　WHB　is　close　to　AWHB.