Objective To propose a scientific method for demand prediction of equipment support force. Methods Based on system dynamic feedback control theory, using the mathematical model as the reflecting media, by means of computer simulation technology, a dynamic simulation model was built according to the historical data, the practical experience and the system inherent relationship and mechanism. Results Under the condition of different parameters, the dynamic evolution behavior of the change range of variables in the model was compared, and the model structure and the causal relationship among the variables were considered comprehensively. When inputting the value range of the variable "combat mission increase rate", the change of the output variable was debugged by software. When the input variables were (0.65, 0.65), the strategic level, operational level and tactical level equipment support force was relatively reasonable. When the input variables were (0.64, 0.64), the ratio of the operational personnel and equipment support personnel could basically meet the needs of modern training or war. Conclusion Through model simulation, considering the development trend of equipment, as well as the usual equipment support mission requirements, and referring to foreign military equipment support force construction experience, policy recommendations were proposed for the construction of equipment support forces in our army.