Abstract: This is an investigation and research into vascular plant flora in Seashell Islands Nature Reserve of the Yellow River Delta,in order to provide theoretical basis of development and utilization on vascular plant resources.According to the preliminary statistics,the number of the halophytes is up to 228 species in Seashell Islands Nature Reserve of the Yellow River Delta,which are subordinate to 149 genera and 58 families,among which the pteridophyte has 3 family and 9 species;the gymnosperm:1 family and species;the angiosperm:54 family,143 genera,218 species.The statistical analysis was made about the vascular plant flora in Seashell Islands near the Yellow River Delta from three levels:family,genera and species.The main results and conclusions are as follows:poor diversity of halophytes;a high degree of differentiation on genera;geological elements is complex and the type of distribution is divers;there are no endemic elements.