Abstract: Boundary control faults of compound fracture possess the character of segmentation in continental extension rifting basin. This paper utilizes the back-stripping technology and the largest displacement subtraction method to recover the forming evolution of boundary control faults of 5 rifts in the eastern compound fracture of Early Cretaceous Epoch in Changling of Song Liao Basin. The result shows that all boundary control faults have experienced 3 evolutionary phase: “Isolated fragment’’, “soft connection”, “hard link”. Finally, a united boundary control fault has formed, which means the secondary faults in the direction of boundary control faults trend composite a united one. Very boundary control faults, however, has differences in the evolutionary history of segmentation, which makes each boundary control fault form in varied period consequently. This has the very important geological significance for oil and gas accumulation in the area of compound fracture: segmentation of boundary control faults command the stage of compound fracture forming and then the distribution of effective hydrocarbon source rocks is controlled by it in turn; the joint parts of boundary control faults segmentation are the relatively weak position of stress, which have the controlling function on the development of volcanic rock reservoir and clastic rock reservoir; the palaeohigh forming in the process of the secondary faults combination is the favorable structural part of hydrocarbon accumulation.