In order to better guide the heavy metal cadmium polluted paddy soils to implement soil remediation and control the soil cadmium poisoning risk，typical cadmium polluted paddy fields in southern China were taken as the research object，the relationship between soil available cadmium content and physiochemical factors was analyzed based on the soil cadmium and the physiochemical properties index determination for 316 monitoring sites，and the forecast model of paddy soils available cadmium was established through stepwise multivariate regression equation.The results showed that the soil available cadmium content of paddy fields in southern China mainly depended on the soil total cadmium(Cdtot)，available zinc(A-Zn)，available sulfur(A-S)，available phosphorus(A-P)and available copper(A-Cu).Through regional investigation and stepwise regression analysis，the prediction model equation of available Cd content(Cdext) in the southern paddy soils was obtained:Cdext=-0.006+0.371(Cdtot)+0.014(A-Zn)+0.001(A-S)-0.001(A-P)+0.006(A-Cu).The model prediction reached a very significant level(P<0.001)，and the determination coefficient(R2)was 0.745.Therefore，the regression model based on the above five soil factors can achieve perfect prediction，and it can provide reference for soil remediation of cadmium polluted paddy field.