Abstract: Since the power of spoofing is slightly larger than that of the real satellite navigation signal, and much less than the high-power interference, anti-spoofing cannot be realized based on conventional multi-antenna satellite navigation receiver due to the changes of array receiving environment. This paper present a method which can improve the array receiving environment and recover the interference suppression ability of multi-antenna satellite navigation receiver. Firstly, improve SNR and interference to noise power ratio by denoiseing preprocessing from the array receive signal, and then employ the minimum the output power criteria to optimize the weight vector. Theoretical analysis and experimental results show that the method can effectively mitigate the spoofing, the array output signal to interference plus noise power ratio is higher, interference suppression after the receiver capture performance is not affected by interference.