Using domestic polyphenylene sulfide(PPS) resin as the raw material,PPS fiber was prepared by melting spinning process.The effect of draw ratio,draw temperature and heat setting temperature on the structure and properties of PPS fiber was studied.The results show that the failure stress and orientation degree increase when the draw ratio and heat setting temperature raise,the shrinkage rate increases with the draw ratio increasing.The failure stress and orientation degree increase to a maximum firstly and then decrease when the draw temperature is elevated,but the shrinkage rate drops as the draw temperature and heat setting temperature increase.