Abstract: To address the problem of low-power navigation spoofing interference signals that cannot be detected by traditional radio interference detection equipment, a method based on despreading cross-correlation is designed to obtain despreading gain by performing local pseudo-code cross-correlation on navigation spoofing interference, thereby achieving warning and detection of navigation deception interference. The carrier cross-correlation method is used to extract the carrier phase differences of multiple-channel navigation spoofing signals, thereby enabling forward estimation of navigation deception interference and achieving the goal of detecting navigation deception sources. It fills the gap in the current mainstream radio interference detection equipment's inability to search for navigation deception interference sources and has practical engineering value.