Abstract: On the basis of metallogenic geological background, ore type, mineral composition, geochemical composition and radioactive anomaly of the ancient zircon placer in Huashanzi, Pizhou, Jiangsu Province, this study further discussed the geological characteristics and prospecting direction of the ancient zircon placer, combined with the metallogenic mechanism of the modern zircon placer. The Huashanzi ancient zircon placer is a new type of sedimentary sand deposit, which occurs in the siltstone of middle and upper Xuzhuang Formation of Middle Cambrian. Its thorium content higher than the normal value of ordinary siltstone is an important prospecting indicator of ancient zircon placer. The Xuzhuang Formation widely distributed in the north of Xuzhou is of better prospecting conditions, while preferential areas for ore exploration are concentrated in Gengzhuang of Biantang, Jiaozhuang of Daquan and Gaoshan of Taierzhuang.