In order to clarify the molecular bioinformatics characteristics and tissue expression patterns of the COBRA gene family members of Huperzia serrata,the physicochemical properties,domains,conserved motifs,cis-acting elements,and genes expression of the family members(HsCOBRAs)were analyzed by bioinformatics techniques,based on the full-length transcriptome data of the H.serrata.The results were as follows:(1)A total of 24 HsCOBRAs family members were screened in the full-length transcriptome of H.serrata,including 9 acidic proteins,11 stabilizing proteins,5 hydrophobic proteins,7 proteins with transmembrane structures,and 3 proteins with signal peptides.(2)Subcellular localization was found in the cell wall,chloroplast,nucleus,and cell membrane.(3)Structural analysis revealed that HsCOBRAs had 7 domains and 6 conserved motifs,and partial members had a highly conserved CCVS structure.(4)HsCOBRAs had 45 cis-acting elements such as CAAT-box and TATA-box.(5)HsCOBRA2 had the highest expressions in leaves,spores,stems and gemma.The study results can provide theoretical basis for further research and biological function verification of HsCOBRAs.