Abstract: Opencast coal mining is a process that combines mining, transport, crushing and dumping links, and the sizing crusher is a key equipment that plays an important part in the integrated mining process. Following an introduction to the technical advantages of the sizing crusher, as well as analysis of the differences between the sizing crushers used at open pit and coal preparation plant from the aspects of working environment and process requirements, the paper presents a summation of the special features and current situation of application of this kind of crusher at opencast mine. Finally, it focuses on the development trend of the crusher and points out that its development should be directed towards making it larger in size, intelligent, more reliable, greener, integrated and intensified. The work made in the paper may serve as a reference and guidance for the research and development of sizing and crushing technology and equipment in China.