The research on the evolution of gravity flow deposits in the Scotia Basin in eastern Canada is insufficient.Therefore，according to the data of core samples，logging，seismic，and magnetic anomaly，the Lower Cretaceous gravity flow deposit units in the Sable Subbasin of the Scotia Basin are defined，and the evolution of deposits and development control factors are revealed and discussed. The results show that the Lower Cretaceous Mississauga Formation （MF）and Logan Canyon Formation（LF）in the Sable Subbasin of the Scotia Basin develop large-scale gravity flow deposits，and deposit units including mass transport deposits（MTDs），gravity flow channels，natural levees，and lobes are identified. The small-scale gravity flow deposits develop in the west of the study area at the early deposit stage of MF（147 Ma before present），and the large-scale slope bottom fans develop in the middle of the study area at the late stage of MF（130 Ma before present）. The small-scale gravity flow deposits commonly develop in the study area at the early deposit stage of LF（113 Ma before present），and the large-scale slope bottom fans develop in the southeast of the study area at the late deposit stage of LF（101 Ma before present）. The shelf-edge deltas and steep continental slopes provide the material foundation and dynamic conditions for the development of gravity flow respectively.