Abstract: Considering that the deployment of sensors in a complex battlefield has a significant impact on situation awareness of both sides on the battlefield, for the three-dimensional (3D) optimal deployment problem of multiple targets awareness using multiple sensors, optimal deployment of multi-sensor for multi-target awareness is derived by using the determinant of Fisher Information Matrix (FIM) as the optimal performance index. The explicit expressions of FIM determinant of 3D sensor-target geometry are derived. Based on this explicit expression, the optimal allocation of the multiple sensors for the multi-target awarene nsors are derived. This method realizes accurate awareness of enemy target and makes up for misjudgment of battlefield situation caused by awareness error. Numerical simulation verifies the results.