Compost turner specialized in producing organic fertilizer and organic biological fertilizer to promote the windrow composting fermentation technology. Combining with crushing, blending, composting function, this self-propelled turner machine can replace composting manually and non-professional forklifts composting. Also, mechanized operations for high-efficiency continuous working has provided significant improvements in air supplying system for processing triangular or trapezoidal material pile, thus expediting processing fermentation, matured material and moisture evaporation