The report of the 20th National Congress of the Communist Party of China emphasizes the comprehensive consolidation of the foundations of food security.Against the backdrop of escalating geopolitical conflicts， this study uses the Russia-Ukraine conflict as a starting point to construct the logic of food crisis formation under such conflicts，analyze its transmission effects，and understand the internal mechanisms of structural contradictions in food supply and demand so as to explore strategies to ensure China’s food security.The study reveals that the food crises caused by geopolitical conflicts reflect the structural contradictions between global food supply and demand.In the short term，the Russia-Ukraine conflict directly leads to a rise in global food prices，which is then transmitted to the fertiliser and energy markets，indirectly increasing food costs.The ongoing fermentation of the Russia-Ukraine conflict is likely to trigger more spillover risks，negatively affecting the stability of the global food supply chain and exacerbating pressures on China’s food supply and market，increasing the cost of agricultural inputs and complicating the formulation and risk of trade policies.Accordingly，four pathways are proposed to secure China’s food security：1）building a diversified pattern of food imports；2）improving China's food security monitoring and early warning systems；3）enhancing fiscal support policies for the food industry；4）facilitating the internal circulation of the food supply chain.