NOVELTY - Harmless static composting treatment of animal carcasses and by-products is performed by building rectangular fermenting cabin on ground with haystack and building wall bodies; paving first layer with carbon-source auxiliary material; paving second layer using animal dejection and/or methane tank residue; putting diseased animal carcasses to prepare third layer of animal carcasses; paving fourth layer by covering animal dejection and/or methane tank residue auxiliary material on animal carcasses; and covering top portion of composting cabin by using thick plastic cloth.    USE - Method for harmless static composting treatment of animal carcasses and by-products (claimed) used as fertilizer.    ADVANTAGE - The method is safe, environment-friendly, and economic, since it uses low-cost composting auxiliary materials (dry grass, straw and animal dejection) to degrade animal carcasses.    DETAILED DESCRIPTION - Harmless static composting treatment of animal carcasses and by-products comprises building rectangular fermenting cabin on ground with haystack and building wall bodies (60-120 cm thick); paving first layer with carbon-source auxiliary material; paving second layer using animal dejection and/or methane tank residue; putting diseased animal carcasses to prepare third layer of animal carcasses; paving fourth layer by covering animal dejection and/or methane tank residue auxiliary material on animal carcasses; and covering top portion of composting cabin by using thick plastic cloth. After composting construction, the method includes composting statically and not turning the stock. The method comprises composting big animal greater than 100 kg, and after 3-6 months, turning the pile for the first time; and to small and middle-sized animals less than 100 kg, turning the pile for 1-3 times after static composting. The first pile turning time is determined according to temperature of the pile. When the temperature is higher than room temperature and less than 15 degrees C, the pile is turned for the first time; and after turning the pile for the first time, big animals are composted and the pile is turned for 2-3 times at intervals of 1-2 months, small and middle-sized animals are composted and the pile is turned for 2-3 times at intervals of 2 weeks to 1 month. After composting, the compost is sprayed to the field as plant fertilizer.