综述了机械合金化、喷射转换、原位渗碳还原、共沉淀等多种WC Co纳米硬质合金粉末的制备方法 ,指出纳米WC Co粉末烧结过程中的致密化温度有明显的降低 ,晶粒长大趋势很强 ,同时给出了致密化后合金的显微组织、力学性能研究发展概况。提出目前存在的问题是烧结过程的晶粒长大的控制 ,采用新型的烧结手段实现快速烧结将是纳米硬质合金未来的发展方向 The preparation methods of various WC Co nano-cemented carbide powders such as mechanical alloying, spray conversion, in-situ carburization reduction and coprecipitation were reviewed. It was pointed out that the densification temperature of nano-sized WC Co powders decreased obviously, Growth trend is very strong, at the same time gives the densification of the alloy microstructure, mechanical properties of the research development. It is put forward that the existing problem is the control of the grain growth in the sintering process and the rapid sintering with a new sintering method will be the future development direction of the nano-hardmetal