When the traditional partitioned modeling method simulates reservoir distribution with multiple sources，the simulated sandbodies show abrupt contact at the boundaries between segments，which does not conform to geological understanding. Therefore，this paper proposed a partitioning coupled modeling method for multi-source reservoirs. Firstly，the research area was divided into several segments according to the influence ranges of different sources and then each part was simulated in a specific order. The simulation results on the segment boundaries modeled earlier were extracted as the conditional data for the adjacent segments modeled later. After combining the well-point data within the segments modeled later，the simulation calculation ensured the continuity of the sandbodies at the boundaries between segments. Finally，the sandbody model of the entire research area was obtained and the simulated sandbodies were continuous on each segment boundary. This paper performed the applied study with the upper sub-member of the fourth member of the Shahejie Formation in the Y935-936 block of the Yanjia Oilfield in the Dongying Sag as the example. The proposed method was compared with traditional partitioned modeling and the variogram modeling based on local variations. The result demonstrates that the partitioned coupling modeling method can build a more realistic three-dimensional geological model of the research area，eliminating the abrupt contact between sandbodies induced by traditional partitioned modeling and improving the modeling quality.