The paper puts forward a new thinking of anti-main-lobe jamming based on multi-static coherent radar. Firstly, the paper analyzes of the feasibility of the anti-main-lobe jamming based on multi-static coherent radar; secondly, proposes the improved two-steps adaptive algorithm. Through the comparison between the simulations of five different algorithms, the result shows that the NVFF-RLS adaptive algorithm proposed in this paper is better than other four algorithms in both the convergence speed and the effect of target signal separation which improve SINR about 30 dB to 36 dB. Simultaneously the cancellation effect states the advantages and the important military value of the anti-main-lobe jamming based on multi-static coherent radar.