In order to meet the needs of all kinds of power consumption in military tasks, a mode transition control strategy for military independent optical diesel storage micro grid is proposed. Based on the structural characteristics of military independent optical diesel storage micro grid, through analyzing the power balance relationship and actual task needs in the system operation, according to the combination of micro source operation characteristics and combat process, the load level is divided, 13 working modes and mode transition judgment basis are designed, and the comprehensive simulation model of optical diesel storage micro grid system is established for analysis. The verification results show that the strategy can complete the transformation and stable operation of each mode in various conditions, and can improve the applicability and reliability of micro grid system.