Abstract: To meet the development requirements of new intelligent command and control modes in future warfare, this paper takes the application of large models in command and decision-making as the background. Aiming at the problem that command and decision-making large models require massive data for training and optimization, this paper studies model training, inference, optimization, scheduling and management. It mainly proposes design and construction ideas including the high-quality construction of the command and decision data system, model training and inference, fine-tuning and management. The research improves the intelligence level of auxiliary decision-making for joint operational command. The constructed command and decision large model can realize real-time battlefield situation judgment, interactive auxiliary support for combat readiness and heuristic generation of operational planning.