Abstract: The Palaeogene sequence stratigraphy in the Maxi region,Raoyang depression may be classified,on the basis of seismic data,well logs and sedimentary facies,into 3 second-order sequences and 10 third-order sequences.The third-order sequences VIII,IX and X are assigned to the fluvial sequences including the base-level rising systems tract and base-level falling systems tract.The third-order sequences Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅴ,Ⅵ and Ⅶ represent the lacustrine sequences,each of which consists of lowstand systems tract,transgressive systems tract and highstand systems tract.The syndepositional structural breaks in the Maxi region have exercised a major control on the distribution of sandstones,development of source rocks,migration of hydrocarbons,and accumulation of subtle hydrocarbons in this region.The model for the accumulation of subtle hydrocarbons shows that Sequences Ⅲ,Ⅳand V below the structural breaks may be regarded as the targets for the further exploration of hydrocarbons.