As the risk of “over-storage” or “under-storage” still exists in the emergency equipment reserve, in order to improve the reserve efficiency, it put forward the flexible procurement strategy of emergency equipment, taking the economic benefit of enterprises and the military procurement cost as the optimization target. By establishing the model of optimizing enterprise reserve strategy and military procurement pricing, the optimal flexible pricing of the military and the corresponding enterprise optimal reserve strategy under the external environmental factors such as the probability of the outbreak of war and the price range of equipment spot market were solved. The decision conclusion was verified by an example analysis. The result shows that the implementation of the optimal strategy would be beneficial for the military and enterprises to share the risk of emergency equipment quantity reserve.