The present invention discloses a natural meat flavor prepared from a porcine bone, characterized by comprising the following ingredients in parts by weight: 400-500 parts of porcine bone, 8-12 parts of glucose, 4-8 parts of cysteine, 4-6 parts of thiamine, 3-7 parts of xylose, 10-15 parts of glycine, and 5-9 parts of soy protein hydrolysate. The process of the present invention comprises the steps that: the porcine bone is frozen first to increase the bone brittleness which facilitates puffing performed on the porcine bone; then calcination is performed on the puffed porcine bone to change minerals in the porcine bone into active absorbable mineral ions which are easy for uptake by the human body. With enzyme, the bone soup is hydrolyzed into the hydrolysates abundant with free amino acids and low molecular weight polypeptides, to facilitate the Maillard reaction; the glycine added to the hydrolysates can improve the meat aroma, and make the aroma stronger and fuller; the addition of the soy protein hydrolysate leads to the increase in the meat aroma of the meat flavor, reduction in the addition of the porcine bone extracts and reduction in the preparation cost.