The invention relates to a staged compost fermentation facility including a staged basic structure, and is characterized in that a vertical movable clapboard is arranged between two up/down bordered step sides of the staged basic structure. The facility is advantageous in carrying on the compost fermentation on pitch topography in mountainous areas by the user in countryside. Not only the fermentation effect of organic fertilizer is good, but also the stack material can be turned over by gravity, thereby saving a great amount of labor force.