20 ARF genes were identified from the capsicum genome by bioinformatics, and these genes were not welldistributed on 12 chromosomes of pepper. The results of the phylogeny relationship showed that ARF genes of pepper could be divided into ClassⅠand Ⅱ, and could be further divided into seven subgroups: Ⅰa, Ⅰb, Ⅰc, Ⅰd, Ⅰe, Ⅱa andⅡb. The results of gene structure showed that ARF gene family members were composed of 1~15 exons, and for each gene expression level of different tissues in different developmental stages revealed that the gene family had certain expression specificity. The qRTPCR uncovered that high salt stress could significantly activate and inhibit the expression of ARF gene family.