During the study of genus Laurencia, a new record species, L. omaezakiana was found from the coast of Yellow Sea, China. In the region, two laurencious species, Laurencia saitoi (previous L. obtusa) and L. okamurai had ever been reported. The algal specimens are different to above known ones. Its thallis are composed of many erect axes given rose to general small holdfast and stolon-like b ranches. The branching model, morphological and anatomical characters of the Chinese specimens are almost co incident with those of L. omaezakiana from Japan described by Masuda. The morphology and anatomy from the Chinese specimens are observed in details with structural figures, and compared with other relative species. A s a distinct species with four peraxial cells and corpsencerise, it will be use fu l to marine algae chemistry for secondary metabolites.