A pot simulation experiment was conducted to study the phosphorus(P)forms in red soil under different P sources \[inorganic phosphorus(potassium dihydrogen phosphate)and organic phosphorus(soy lecithin)\] addition to compartment chamber(P 50 mg·kg-1soil respectively)and two different kinds of arbuscular mycorrhizal fungi(AMF),ieGlomus mosseae（GM）and Glomus etunicatum(GE）,inoculation for intercropping maize planting condition.The research results showed that regardless of the inoculation of AMF，intercropping treatment significantly decreased the available P content in soil of root chamber,which indicated that intercropping promoted the absorption of available P by maize plants from soil,and the available P exhaust began from the rhizosphere soil.Except the OrgP under OP50 addition and monomaize treatment,AMF inoculation increased the contents of all inorganic P forms to a certain extent.Ca2P,AlP and OrgP were the main group of soil available P in the soil of root chamber,and the OrgP was significantly negative correlated with available P in red soil.