Abstract: For improving the quality and increasing efficiency of the third generation nuclear power plants, a more economical and compact new-type steam generator (ZH-J60 SG) is designed. ZH-J60 SG uses advanced technologies at the most, while ensuring the equipment safety and also paying much attention to the technical maturity in its design and manufacturing. This SG adds axial economizer and sludge collector, and adopts small vapor-liquid separator with double stages of vanes. The calculation and analysis show that recirculation ratio of secondary side flow, rating power to equipment weight ratio, outlet steam quality and operating reliability of ZH-J60 SG are much promoted. The technical performance of ZH-J60 SG reaches the top level of steam generators used for the third generation nuclear power plants, and some of the key parameters are even better.