Between World War II and the Cold War, the United States, dominated by military-industrial capital, established a new form of capitalist world hegemony. Based on the knowledge of system dynamics theory, this paper determines the boundary conditions and causality of the simulation research program of the rise of the U.S. military-industrial complex and the change of the economic pattern, in addition to supplementing the three system dynamics model test. Using Vensim simulation and analysis software, numerical simulation simulation analysis of the model in this paper. Set the time period in 1931~1990, when the U.S. military-industrial complex productivity decayed from 0.8 to 0.4, produced the U.S. national per capita income and the emergence of a decline in the economic phenomenon, which directly affects the global economic pattern changes, but also highlights the U.S. military-industrial complex rise and international status.