Abstract: This paper presents an algorithm to detect whether logic functions is beneficial from implementing by dual logic.The proposed algorithm is based on the characteristics of XOR logic,that is,two minimum-terms having Hamming distance2can be expressed by XOR operation.With calculating the Hamming distance between two minimum-terms and analyzing the logic mode of functions,a detection condition was developed.The proposed algorithm has been implemented in C and tested on MCNC benchmarks.The experimental results show that the proposed algorithm is efficient.