The paper improved the extracting method of crude curcin liquid in Jatropha seeds, and by orthoglnal experiment design , the best condition of the PBS was obtained. The conclusions include following aspects: with PBS of pH=7.2, concentration=0.02mol/mL, volume=100ml, the effiency of extraction of curcin from Jatrapha' seeds is the optimum, which is 16.78%.By signal method, the best matching of material of foam is found. Under the proportion of the material of foam: Polyether:100, TDI:150, TEDA:0.6, DBTDL:0....