The discovery of sulfide-melt inclusions in mantle xenoliths is of great significance in further understanding mantle depletion and enrichment, as well as ore-forming processes of mantle fluids. Many sulfide-melt inclusions are also found in lherzolite xenoliths of alkali basalt from the Xinchang area, Zhejiang Province. The EPMA study shows that sulfide phases in sulfide-melt inclusions are mainly composed of pentlandite, with a small amount of pyhrrotite. The Ni/Fe of sulfide inclusions is related to the content of olivine in the host mantle rocks. The composition of a single sulfide inclusion is not homogeneous, with Ni/Fe and (Fe+Ni)/S increasing from the center to the margin. Based on comparisons with sulfide-melt inclusion data from Hannuoba of China, West Eifel of Germany and Nogrod-Gomor of Northern Hungary and Southern Slovak, it may be considered that the compositions of sulfide-melt inclusions from different areas are various , showing regional characteristics in the sulfide compositions of mantle fluids.