The invention discloses a process for producing an organic fertilizer by using contents in intestines and stomachs of animals and faeces, which comprises the following steps: (1) collecting contents in intestines and stomachs of cattle and sheep and faeces thereof, separating and sieving the materials above by using a drum screen, and conveying the obtained object to a drum high-temperature furnace to heat for drying; (2) adding the dried material into a high-temperature fermentation tank, and adding a multifunctional microbial inoculant and auxiliary materials for carrying out high-temperature aerobic fermentation; (3) sampling for inspection and crushing; and (4) after the obtained product is granulated and enveloped, carrying out air drying and packaging on the obtained product, so that finished products are obtained. The process disclosed by the invention can provide a process for producing organic fertilizers through the low-cost and rapid and efficient treatment of animal wastes for large and medium-sized slaughterhouses and large and medium-sized drum screen farms, and can ensure that the deodorization and fly maggot eradication effects of animal wastes are good, the drying effect is high, an effect of energy conservation and environmental protection is achieved, the land is saved, the capital investment is saved, the treatment time is saved, and formed products can be sold as organic fertilizers, and profitable, therefore, the process has a great significance for environmental protection.