Abstract:At present, maritime long-range precision strikes mainly rely on ship-based air early warning aircraft, unmanned aerial vehicles, and microwave over-the-horizon radars to provide target indication information for anti-ship missiles, and there are problems such as limited detection distance, short blank time, and incomplete information elements, It cannot provide continuous and long-distance target indication information for missiles in long-sea operations, which restricts the combat effectiveness of missile weapons. In recent years, with the rapid development of satellite remote sensing technology, space-based information has gradually improved its ability to support the application of missiles in precision strikes against the sea by virtue of its "stand high and see far" characteristics. By analyzing and constructing a model of the key influencing factors that affect the space-based information to support the precision strike of the missile on the sea, carry out simulation analysis of missile capture probability based on influencing factors such as target positioning accuracy and time delay, the simulation results show that improving the target positioning accuracy and shortening the target indication information delay can effectively improve the probability of space-based information supporting missile weapons to capture the target. then put forward the optimization ideas and suggestions on the engineering design and application of space-based information supporting missiles for long-range precision strikes against the sea,to provide a reference for the research on space-based information to support the long-range precision strike of missiles against the sea.