Abstract: The formation of polyolement atomic clusters is found to be controlled by statistics law.Clusters of meeting statistic distributions can be written as AB_n or AB_nC_m, in which A is nucleus of a cluster and B, C are variable units. A set of clusters from same nucleus A and different number of B or C units can be fitted by same lognormal curve. If observing from the position of statistics laws, all AB_n and most AB_nC_m types of clusters are similar with the binary clusters. Some other AB_nC_m type of clusters formed with substitute reaction, i.e. unit B is substituted by unit C in clusters formation, and the size or construction of whole set of AB_nC_m is not changed.