Adaptive nulling algorithm can suppress satellite navigation interference signals. However, these algorithms cannot guarantee the phase stability of satellite signals, making them unsuitable for high-precision positioning. In theory, multi-beamforming algorithm must be used. A simplified implementation method for digital multi-beamforming anti-interference algorithm is studied. Firstly, orthogonal processing of pointing and auxiliary channels is achieved through array signal preprocessing. Then adaptive signal processing is employed to achieve both beam pointing and interference signal suppression. Compared to conventional methods, the approach proposed is easier to implement and requires lower resource consumption.The performance of the proposed implementation method is verified by algorithm simulation.