Abstract: Turning machine is a kind of mechanical equipment developed and produced based on dynamic composting.As a key equipment in composting fermentation process，it has a huge market space.Types of turning machines and characteristics of various types of machines were analyzed，key components of turning machine were introduced，research status and existing problems of domestic and foreign turning machine were analyzed，and research design and development direction proposal of turning machine were proposed to provide a reference for future research and use of turning machines for large-scale farms.