This study presents an analysis of the evolution of shell ridge islands on the front margin of the abandoned delta lobe and of the storm shell islands on the head of the tidal river gulf or on the outer side of the tidal channel in northern Yellow River delta. Using comparisons of topographic maps, landsat images and other survey results during different times as well as new survey data, the changes of quantity, area and evolution characteristics about the two kinds of shell ridge islands have been studied. At present, the shell ridge islands are changing dynamically, especially the natural evolvement course of the storm shell islands on the head of the tidal river gulf or on the outer side of the tidal channel is almost ended and turning into a new estate.