Abstract: In order to illustrate the aid leaching effect of microwave low temperature pretreatment on fine scattered gold wrapped by sulfide，the effects of various aid-leaching conditions on gold leaching efficiency was researched with gold concentrate of flotation from Shuangqishan，Fujian，as raw materials，and the microwave low temperature pretreatment as the key method.The results showed that with the microwave pretreatment power of 3 kW，the time of microwave pretreatment for 6 min(the corresponding pretreatment temperature is nearly 300 ℃)，particle size of roasting slag of 80% passing 0.038 mm，dosage of sodium cyanide of 3 kg/t，leaching for 8 h，gold leaching rate reached 96.49%，and 4.17 percentage points higher than that with related conditions roasted in muffle furnace.Compared with strong oxidants aid-leaching，the leaching rate pretreated by microwave low temperature is 2 percentage points higher，since the microwave low temperature pretreatment changes the structure of ore，while the strong oxidants only ameliorate the concentration of dissolved oxygen in leaching process.Compared with other aid-leaching methods，the microwave low temperature pretreatment can increase gold leaching rate，shorten length of leaching time.

Key words: Gold concentrate from flotation, Gold wrapped by sulfide, Microwave low temperature pretreatment, Cyanide leaching, Aid-leaching, Muffle roaster, Strong oxidant