In this paper, the distributed fault estimation method of more electric aircraft dissimilar redundant actuation system based on bond graph model is investigated. Firstly, the bond graph technique is used to model the redundant actuation system of more electric aircraft. Since the developed model is very complex, the computational efficiency is low and the scalability is poor. To solve these problems, the global bond graph model is decomposed into local computational independent sub-models based on model decomposition. Secondly, analytical redundancy relations (ARRs) are established for distributed fault detection and isolation based on the sub-models. Finally, a fuzzy extended Kalman filter (FEKF) based distributed fault estimation method is proposed. The simulation results verify the effectiveness of the distributed fault estimation method.