The Sabin IPV was manufactured with poliovirus type1, 2, 3 Sabin strains and Vero cells by micro-carrier culture in 550 liter bioreactors. The virus suspension was harvested ,ultra-concentrated, purified and inactivated with formalin. Three formulations A,B,C of Sabin IPV were used, the DAg contents for A were type1 45,type2 64,type3 67.5 DU /0.5ml/per dose; for B 30,32,45 DU/0.5ml/per dose; for C 15,16,22.5 DU/0.5ml/per dose.