Based on the operational process of surface-to-air missile system, this paper quantitatively analyzes the specific threat of stealth weapons to ground air defense operations from the three aspects of the compression of early warning time, the reduction of guidance accuracy and the reduction of hit probability. Aiming at the distinguishing operational scenarios of single fire unit, two fire units and multiple fire units, it analyzes and studies the means and measures to deal with the stealth weapons, and gives countermeasures and suggestions. It plays an important reference role in improving the operational effectiveness of ground air defense operations and ground-to-air missile systems.