TheB-BOX (BBX)gene family is widely distributed in animals and plants and is involved in the regulation of their growth and development. In plants,BBXgenes play important roles in hormone signaling, biotic and abiotic stress, light-regulated photomorphogenesis, flowering, shade response, and pigment accumulation. However, there has been no systematic analysis of theBBXfamily inPlatanus×acerifolia. In this study, we identified 39BBXgenes from theP. ×acerifoliagenome, and used TBtools, MEGA, MEME, NCBI CCD, PLANTCARE and other tools for gene collinearity analysis, phylogenetic analysis, gene structure, conserved domain analysis, and promoter cis-element analysis, and used the qRT-PCR and transcriptome data for analyzing expression pattern of thePaBBXgenes. Collinearity analysis indicated segmental duplication was the main driver of theBBXfamily inP. ×acerifolia, and phylogenetic analysis showed that the PaBBX family was divided into five subfamilies: I, II, III, IV and V. Gene structure analysis showed that somePaBBXgenes contained super-long introns that may regulate their own expression. Moreover, the promoter ofPaBBXgenes contained a significant number of cis-acting elements that are associated with plant growth and development, as well as hormone and stress responses. The qRT-PCR results and transcriptome data indicated that certainPaBBXgenes exhibited tissue-specific and stage-specific expression patterns, suggesting that these genes may have distinct regulatory roles inP. ×acerifoliagrowth and development. In addition, somePaBBXgenes were regularly expressed during the annual growth ofP. ×acerifolia, corresponding to different stages of flower transition, dormancy, and bud break, indicating that these genes may be involved in the regulation of flowering and/or dormancy ofP. ×acerifolia. This article provided new ideas for the study of dormancy regulation and annual growth patterns in perennial deciduous plants.