Abstract Modern warfare is a joint operation supported by space-based information, and space-based information is a “benefit multiplier” for joint combat effectiveness. In order to study the impact of space-based information support on joint operations, this paper improves the classical Lanchester equation [1] by introducing the space-based information support capability index, coordination index, decision-making index, etc. The Lanchester combat model was simulated and a scenario simulation was carried out. The s…