Abstract: Hydrocarbon accumulation stages and times in the central Junggar Basin are analyzed by means of trap formation time,hydrocarbon generation and expulsion history,authigenic mineral isotope dating,fluid inclusion and reservoir geochemistry.Jurassic reservoirs in block 1 and 3 have experienced 3 stages: Middle-Late Jurassic,the end of Early Cretaceous and Paleogene till now.Cretaceous reservoirs in block 1 and 3 have experienced 2 stages: the end of Early Cretaceous and Paleogene till now.Jurassic and Cretaceous reservoirs in block 2 and 4 have experienced 1 stage: the end of Early Cretaceous till now.Exploration directions in Each stage have been pointed out.In the north of block 3,primary reservoirs formed in the end of Early Cretaceous should be focused on.In block 1,secondary reservoirs formed from Paleogene till now should be paid attention to.In block 2 and 4,primary reservoirs formed from Paleogene till now have great potential.