According to the characteristics of straw raw materials and the operating habits of farm operators, KMACH implements professional and humanized optimization design for the bunker filler based on European mature design concept and advanced technology. The filler mainly consists of one driving chassis, one compost hopper and one swiveling belt conveyor. It is used for filling Phase I bunker and Phase II tunnel. The mixed raw materials are evenly scattered and piled up to ensure the smooth ventilation of the compost mixture, and the compost structure is well protected.