Aim\ To find the maximum clique of circulant graph \%C\-n\%. Methods By means of characteristics of the graph
the combinatorial algorithm is used. Results\ The order and the number of the maximum clique of circulant graph \%C\-n\% are presented when it satisfies the following conditions: ① \%a\-i=a\-1+(i-1)d(i=1
2
\:
k); ② d\%∈Z\++ and \%d≠l\%; ③ \%a\-1∈Z\++ and \%a\-1≠md