Congenital poikiloderma is an extremely rare autosomal dominant genetic syndrome, characterized by a combination of early onset poikiloderma, telangiectasia, and epidermal atrophy. FAM111B gene with multiple mutations has been identified as a potential causative gene for congenital poikiloderma. In this report, we described a boy with congenital poikiloderma confirmed by clinical manifestations. Next-generation sequencing based on a gene probe panel consisting of 541 genetic loci of genodermatoses, was used to screen mutations of the proband and his parents. Results showed that a missense mutation in the FAM111B gene c.1883G>A (rs587777238) was identified in the proband, but absent in his parents, indicating the mutation is de novo. In conclusion, a new case of congenital poikiloderma in China was reported, and the hotspot mutations in codon 628 of FAM111B gene was reviewed, as well as authenticating the uncertain association between genotypes and phenotypes in this rare disease.