Abstract: Subtle reservoirs have become the important factors for increased reserves in Junggar basin.The petroleum geological conditions are very good in Baijiahai salient and there is great exploration potential of lithologic hydrocarbon reservoir in Jurassic strat.Based on high resolution sequence stratigraphy, in combination with geology analysis and geophysics technology,the uniform sequence strata frame with well and seismic has been established,which can accurately reveal the combination regularity among source rock,reservoir stratum and cap rock,increase the predicting ability of petroleum exploration and thus provide the guidance for Junggar basin to discover subtle reservoirs.