This project was carried out in an effort to investigate how modified rice husk charcoal and modified zeolite affectthe phosphorus efficiency using rice huskcharcoal(R)，hydrochloric acid modified rice huskcharcoal(HR)，zeolite(Z)，ammonium chloride modifiedzeolite(NZ)，roastedzeolite(RZ)and ammonium chloride modified roasted zeolite (NRZ)applied as carriers of phosphorus to mixed fertilizer.The amounts of modified rice husk charcoal and modifiedzeolite added to mixed fertilizer for each treatment were1%，3%，5% and 8% respectively.Then we mixed the fertilizerwith redearth，analyzed the available phosphorus content after7，14，28 days and 56 days ofincubation，respectively.Meanwhile，the effect of modified rice husk charcoal and modified zeolite on the utilization ratio of phosphate in maizestudied by potexperiments.The results showed that the modified manners and additions of rice husk charcoal and zeolitehad significant effects on soil available phosphorus content after7，14 days and 28 days of incubation.Additionally，theinteraction between modified manners and additions displayed significant effect on the available phosphoruscontent.Theadditions of rice husk charcoal and zeolite was the dominant factor affecting the soil available phosphoruscontent.Adding modified rice husk charcoal and modified zeolite to mixed fertilizer increased the available phosphorus content of soil andreduced the soil phosphate fixationrate.The adsorption capacity of zeolite was increased after ammonium chloride modifiedand roastedtreatment，which improved the availability of phosphorus insoil.The adsorption capacity of rice husk charcoalto phosphorus in soil was increased after modified byHCl，and the fixation rate of phosphorus in soil wasreduced.ComparedwithCK，the utilization ratio of phosphate in maize increased by 34.45%～ 45.53% with the mixed fertilizer added modifiedrice husk charcoal and modifiedzeolite，but the differences between each modified material were not significant.