An array antenna based spoofing interference detection and suppression method for satellite navigation is proposed. Authentic satellite navigation signals incident to array antenna from multiple directions in upper hemisphere space while spoofing signals incident to array antenna from the same direction are used for interference detection and judgment. Firstly, the signals received by each array element channel are dispreading in parallel. Secondly, the azimuth estimation of each satellite is carried out by using the array data after dispreading. Next, interference detection decisions are made according to the consistency of the estimated satellite data. Finally, the covariance matrix is reconstructed with the direction information of the spoofing interference, and the adaptive nulling algorithm is used to suppress the spoofing interference. The correctness and effectiveness of the proposed method are verified by computer simulation.