It is indicated that the mudstone of lacustrine facies in Jiufotang formation and Shahai formation were the oil source rock in Fuxin basin.The main oil-source depression and oil-reservoir structure were discussed.The delta sand trap sector was benefit to the oil-gas convey and accumulation was stressed and the type of oil-reservoir layer,oil-contained system,grow-reservoir-cover system and its trap,as well as oil-cover distributing character were analyzed in this paper.The exploit scale was evaluated and exploration about oil-gas condition in the basin was suggested.