The surface area and alkalinity of rice husk biochars significantly increased as production temperature rose from 300 to 700 ℃., while the number of functional groups (e.g.,carboxyl) decreased. RH300 may be suitable to be applied in water treatment due to the easy separation of immobilized Pb and better recycling usage. The Pb immobilized on RH500 and RH700 was mainly acidic soluble and generally stable.These findings suggest RH500 and RH700 are of huge potential to be applied in soil remediation to immobilize Pb and reduce its environmental risks.