For the problem that the Beidou III system is very easily disturbed, this article proposed a method with smart antennas. it uses power inverted adaptive zero algorithm based on uniform straight line array . To adapt to the interference environment of rapid changes , On this basis, a null-pit broadening and deepening robust algorithm is proposed. The algorithm can effectively suppress the interference under high dynamic environment. At the same time,Deep coupling technology combined with vector tracking. It combined with deep coupling technology of vector tracking. At last, the simulation result demonstrates the new method is right and available, high engineering application value.