Abstract: For antenna selection algorithm of multiple-input multiple-output(MIMO)systems, the exhaustive search algorithm can obtain optimal property,but require lots of matrix computation with high complexity.The traditional antenna selection algorithm based on correlation and similarity has lower computational complexity,but lost more capacity performance.For this problem,a receive antenna selection algorithm based on dissimilarity is proposed aimed at getting larger capacity.The paper analyzes the impact of selection criterion with different dissimilarity for the system.Compared with the traditional selection algorithm based on correlation and similarity antenna,the proposed algorithm can reduce the computational complexity efficiently,and improve the capacity performance.The results of simulation show that the proposed algorithm has better system performance,and is suitable for real time communication system.