There exist the most abundant littoral Zr-Ti placer resources of China in Hainan Island.Nevertheless, with largescale exploitation for a long time, the littoral placer resources in land area are dwindling gradually.Surrounded by sea, Hainan Island, has long coastline with broad and sandy coast, which is particularly favorable for the formation of marine placer deposits.This paper summarizes the exploration status and results of neritic placer resources in Hainan Island offshore area in recent years, and analyzes the geological characteristics of placer deposits.From five factors such as provenances, climate and hydrodynamic conditions, coastal type and geomorphic type, the quaternary sedimentation, and fluctuation of sea level, synthetically analysis of the minerogenic conditions was conducted The ore-controlling factors of neritic placer deposits is also expounded.On this base, combining the historical survey data, with systematical analysis of the ore-forming beneficial factors, this text identified four pieces of neritic regions with good potential of placer resources, namely the areas from south Dong'ao Tow of Houhai sea to the Tiantou Harbor in Wanning City, from Gancheng Town in Dongfang City to west Ledong County of Yinggehai Sea, from Puqian Bay to Jingxin Cape in Wenchang City, and from Maniao Harbor to Dongying Harbor in Lin'gao County.These four neritic regions are important prospecting targets for placer deposits exploration in future.