The unclear evolution process of Yong1 glutenite body in Yonganzhen Oilfield，Dongying Sag adds difficulties to determine the reservoir type，which restricts the development of further exploration. The evolution process of Yong1 glutenite body and its influence on hydrocarbon accumulation are studied through 3D seismic interpretation，well logging and mud logging analysis，core observation，thin section observation，and physical property analysis. The results show that Yong1 glutenite body deposition conforms to the principle of“channel-fan correspondence”，and its provenance is provided by Chenjiazhuang uplift in the northwest，the debris transported along the NW-SE paleochannel between the uplift and Yong1 area. The isolated uplift of the Yong1 sand-conglomerate body are caused by the late intrusion of diabase. The earliest intrusion occurred in the period of the Upper Submember of the 4th Member of Shahejie Formation（the Upper Es4 Member）while diabase only intruded into the granitic gneiss basement and did not punctured the rock mass，and this process lasted until the early sedimentation of the 3rd Member of Shahejie Formation（the Es3 Member）. After the middle sedimentary period of the Es3 Member，diabase continued to intrude，Yong1 glutenite body continued to uplift，and rock was punctured gradually. This process lasted until the late sedimentary period of the Es3 Member. Magmatic activity leads to the formation of high-angle faults and fractures in the periphery of the glutenite body，which improves the reservoir space and percolation conditions，and effectively communicates the hydrocarbon source rocks in the Es3 and Es4 Member，forming a favorable accumulation area for hydrocarbon.