With the outbreak of the Russian-Ukrainian war, the world economy has been deeply affected. Some countries that depend on Russian energy imports are in an energy crisis at this time. With the increase in demand for weapons and equipment, the war stimulated the development of Russian military-industrial complexes. The world's financial markets have also become volatile. Ukraine's fertile black soil feeds four million people. However, as the war escalated, wheat cultivation in Ukraine was also deeply affected, endangering the security of the global food supply chain. What strategies will some countries adopt to deal with the energy crisis? How can global investors plan their portfolios? How will the shortage of wheat affect the global food supply chain? In the face of a series of sanctions by Western countries led by the United States, how will Russia respond? This article attempts to analyze the impact of the Russia-Ukraine war on the world economy from three perspectives: energy and manufacturing, financial markets, and agricultural product markets.