Constructed rapid infiltration(CRI) system is a whole new biology treatmentsystem, developing step by step from the base of traditional land treatment byZHONG Zuo-shen of China University of Geosciences BeiJing, currently CRI iscommonly used to treat domestic wastewater and slight concentration of river. mostpeople research about COD,LAS,BOD,NH4-N and so on, but there are few researchabout treat T-P and T-N by CRI, therefore in this paper we study CRI in detail ,basingon the treatment of T-P and several sta...