Abstract: The Miocene Zhujiang Formation in Zhusan Depression of Pearl River Estuary Basin is an important oil-bearing series. However, poor study on the sedimentary paleoenvironment of the coastal shallow sea facies of Zhujiang Formation in the Qionghai Bulge restricted the further energy exploration in this area. With the guidance of sedimentology and the full use of core, drilling, logging, and seismic data, the sedimentary evolution and controlling factors of the first member of the Zhujiang Formation in the eastern dip end of the Qionghai Bulge were studied. Results show that: ① Coastal and shallow sea sediments were developed in the research area, from which sedimentary facies of nearshore sandbar, nearshore sandbar lateral margin, nearshore mud flat, offshore sandbar, offshore sandbar lateral margin, and shallow sea mud flat were recognized. ② The central part of the research area is characterized by the facies of nearshore sandbar, nearshore sandbar lateral margin, nearshore sandbar, and nearshore sandbar lateral margin. The sandbar lateral margin is surrounded by sediment around the sandbar periphery and distributed in an NE-SW direction, parallel to the coastline. ③ From bottom to top, there was a transition from coastal to shallow sea sedimentation, in which sand bodies are continuously intercalated in the southwestern and northeastern parts. The thickness of sand bars in the southwest part gradually increased, while the thickness of sand bars in the middle and northeast parts initially increased and then decreased. ④ The main controlling factors include paleogeomorphology on the sedimentary environment, sea level change on the type of facies belt, the provenance supply on the size of the sand bar, and the wave and current on the shape of the sand body.