Deep-water area is one of the most important fields for oil and gas exploration in Qiongdongnan Basin, so it is very important for the next exploration to predict large-scale reservoirs in this area. Based on drilling, logging and high-precision three-dimensional seismic datum, the sediment source direction and submarine fan distribution of Baonan fault terrace zone in deep water area of southeastern Qiongdongnan Basin are studied by means of well-seismic fine calibration, skeleton sand body carving and high-precision three-dimensional geomorphological superposition. The results show that: (1) the main sediments of Baonan fault terrace zone came from the southern uplift; (2) two large submarine fans, Yongle C-1 and Yongle D-1, developed in the study area are of great significance for exploration, which are consisted of superimposed fans of different periods with faults communicating underlying source rocks.