The Lehua-Dexing metallogenic belt in northeastern Jiangxi is located on the northeast margin of the Jiangnan massif, where there are the super-large Dexing porphyry copper deposit , the super-large Jinshan gold deposit and the large Yinshan polymetallic deposit as well as many medium and small deposits. The copper and gold reserves in the belt account respectively for 17. 5 per cent of copper reserves and 37 per cent of gold reserves of associated gold deposits (in which gold occurs as a valuable component in ores) of the whole country. Intensive study of the representative deposits and regional ore-forming processes of the Lehua-Dexing metallogenic belt has great significance for revealing the genesis of large and super-large deposits, bringing to light the formation mechanisms of zoning of ore deposits and developing the metallogeny of ore deposits. In this paper, new advances in the study of the ore-forming processes of this metallogenic belt are reviewed and the current problems in the study discussed. Finally, the research prospects on the ore-forming processes are presented by the author.