The fault is the important passage of hydrocarbon migration and the fault closure also is the important type of oil trap.After analysis and study the fault clay,the impermeable matter of fault(the pitch, the cement matter),the faulted contact ground and the fault dip,the strain of the fault inlier plane,fault activity,the fault ofpump of earthquake,the pass of fault inlier plane,the migration of fault set strike,the migration from fault to stored land.As mentioned above,we proposed that the two problem are still need be reinforced study:the hydrocarbon migration mechanism follow the fault set strike;the rift of grit mudstone spatial distribution pattern of the cracks in sedimentation basin effect closing a function.