The Jiangnan ophiolite zone is located in the southeastern margin of the Jiangnan Ancient Continent, which extends more than 200km from Yiyang County of Jiangxi Province to Shexian County of Anhui Province. Our rese- arches confirm that: 1 .The Fuchuan ophiolite massif is well-reservel, consists of harzburgite, cumulus gabbro and spilitic pillow lavas (from bottom to upper). 2. The northeastern Jiangxi basic-ultrabasic complex zone is comparable to the Fuchuan ophiolite. They form the Jiangnan ophiolite zone. This zone stretches along the southeastern margin of the Jiangnan Ancient Continent and is named as the Jiangnan ophiolite zone. 3. The Jiangnan ophiolite zone is developed in slightly metamorphic socks of Proterzioc Era and is inferred to be formed during 950一1400Ma. 4. volcanic rocks of the Jiangnan opiolite zone are a series of spilite- keratophyre, they show a model strongly enriched in LREE which suggests that ophiolite zone may be formed in the initial spreading stage of a back- asc basin. 5. Geochemistry and pertrochemistry of cumulates and volcanic rocks show an obviously inter-compensative and systematic evolution trend. These rocks resulted from the evolution of the same magma chamber.