Abstract: This paper proposes a new robust adaptive filtering algorithm for stereophonic acoustic echo cancellation in the environment where impulsive noise presents.Based on the two channel gradient lattice ladder algorithm which is fast and computationally efficient,the new algorithm employs M-estimate technique,with which a scheme for combating impulsive interference is developed and proved effective.Compared to the prototype algorithm,the resultant new algorithm is more robust to the impulsive noise corrupting the desired signal at the near-end and the input signal at the far-end.Experiments are also conducted to verify the efficiency of the new algorithm.