Abstract: The Late Paleozoic epitherrnal gold deposits have been discovered in Tulasu area in west Tianshan mountains recently and were devided into two types:adularia-sericite type and silicified rock type,both are the active products of volcanic geotherml-fluid system and were controlled by three-grade structuresobviously in order:the Tulasu basin trending nearly E-W control, the regional metallogenic zone; the nearly NS structural belt crosscutting the nearly E-W one control the gold ore field; the volcanic apparatus control the distribution of gold-ore bodies. And the host structures of ore bodies are low-grade faults.