With the increased demand of oilseeds and oilseed products in China, this paper analyzes network properties of the international oilseed trade of China by using network indexes (degree, density, degree centrality, betweenness centrality, closeness centrality, and clustering coefficient). The result shows that China, especially in oilseeds degree-network, has been considerably increased in power over time as in-degree and closeness centrality mounted up. Moreover, both the control ability and immediacy of China in a complex network are rising. South Korea not only depends heavily on imports of oilseeds but also imports large quantities from China. Thus, a change in China’s influence in the trade network could have a direct and indirect impact on Korea’s demand and supply of oilseeds. To minimize this impact, South Korea should come up with countermeasures such as maintaining the domestic production capacity and diversifying import partners.