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Taxonomy of the genus <i>Cinnamomum</i> Schaeff. (Lauraceae) is difficult because of parallel evolution of morphology. Recent phylogenomic and taxonomic studies have clarified the problem and subdivided the Asian <i>Cinnamomum</i> into two genera, i.e., <i>Camphora</i> Fabr. and <i>Cinnamomum</i> sensu stricto. Here we sequenced and characterized the plastome of a recently described species <i>Cinnamomum guizhouense</i> C.Y. Deng, Zhi Yang et Y. Yang, performed a phylogenomic analysis, and also conducted a comparative analysis. The plastome of <i>Cinnamomum guizhouense</i> is 152,739 bp long and quadri-parted with a pair of inverted repeat regions (IR: 20,132 bp) divided by a small single copy region (SSC: 18,852 bp) and a large single copy region (LSC: 93,623 bp). The plastome possesses a total of 128 genes including 82 protein-coding genes, 36 tRNA genes, and eight rRNA genes, which is similar to most published plastomes of the core Lauraceae group. The plastome of <i>Cinnamomum guizhouense</i> displays higher similarity to <i>Camphora</i> than <i>Cinnamomum</i>. Our phylogenomic result suggests that <i>Cinnamomum guizhouense</i> belongs to the <i>Camphora</i> clade. As a result, we propose a new combination, i.e. <i>Camphora guizhouensis</i> (C.Y. Deng, Zhi Yang et Y. Yang) Zhi Yang et Y.Yang, comb. nov.