Abstract: The 2nd generation selective hydrodesulfurization technology（RSDS-Ⅱ）for FCCG has been developed and commercialized. The technology uses the stabilized gasoline as feed, sets a pre-reactor to remove diene and adopts a feed filter. These measures guarantee the HDS unit to run consecutively and stably for a long period. The commercial results show that RSDS-Ⅱ technology can produce clean gasoline with sulfur content less than 150 μg/g or 50 μg/g and the octane number loss of product is less. Due to high selectivity and good stability, RSDS-II technology can meet the requirement of refinery gasoline upgrading.