Linshang fault is one of the NEstriking faults which controls the Huiming Sag in the Bohai Bay Basin. The writers tried to analyze the activity of these faults for understanding differentiation of the Huimin Sag after the depositing of the Member 3 of the Paleogene Shahejie Formation. By analyzing the fault geometry, activity of different stages and segments of the Linshang fault, and the related Cenozoic structural evolution of the Bohai Bay Basin, this paper gets some new conclusions as following: ① The prototype of the Linshang fault is a dextral transtensional fault. ② The movement rates of the main segment gradually increases from west to east, and movement rates of the branch faults decrease from center to both sides. ③ The movement rates of the fault are stronger during the depositing of the Member 3 to Member 2 of the Paleogene Shahejie Formation, reaching to the maximum during the depositing of the Member 2 of the Paleogene Shahejie Formation, then gradually decreasing, increasing a little during depositing of the Paleogene Dongying Formation, reaching to the minimum during depositing of the Neogene Guantao Formation, and increasing during depositing of the Neogene Minghuazhen Formation. ④ The difference of the fault activity at the different segments were controlled by the location of strikeslip fault in the same direction which formed with the strikeslipping of the Linshang fault, and the differences at different stages of fautling are consistent with the Cenozoic structural evolution of the Bohai Bay Basin.