It is the research direction of this paper to visualize the complex and invisible battlefield situation. Based on Google Map, this paper introduces a method to display the air defense situation of virtual battlefield. The contents include system framework design and Google Map calling method, air defense situation display mode, and an example to further introduce the air defense situation deduction process of battlefield. This method has great expansibility and provides a new reference for Red-Blue confrontation, radar network detection, point trace data fusion, intelligent assistant decision making and complex battlefield situation estimation.