Abstract: A conservative algorithm MFBI is adopted during the simulation of the complex flow situation based on the conventional chimera technique and the non-conservative problem of the information exchange between different zones is conquered.To improve the lift coefficient at the large attack angle,the subsection evolution algorithm is chosen to optimize the high-lift configure parameters.Compared to the original configuration,the optimal result shows that the lift curves,as well as C_Lmax,are substantially improved.During the optimization design process,when compared to the non-conservative scheme,the conservative chimera technique has a better performance on numerical exactness and convergence.