For detection and identification of GNSS spoofing,this paper proposes to use multi-antenna two-channel direction-finding method and the carrier phase observed quantities that are provided by the receiver to estimate the arrival direction of GNSS signal or spoofing signal,which is then compared with the ephemeris data solved by the receiver.In such a way,it is possible to make high-precision estimation of the arrival direction of spoofing signal.The validity of the proposed algorithm was validated with a simulation test..