The invention discloses pork rib chilli sauce and a preparation method thereof, and the pork rib chilli sauce is characterized by being prepared from the following raw materials by weight: 2-3 parts of isatis root, 1-2 parts of bunge cherry seed, 1.5-2.4 parts of amomum villosum, 1-1.2 parts of tangerine pith, 1.5-1.8 parts of rosa laevigata, 1.5-1.8 parts of hemipilia yunnanensis (finet. ) schlecht., 1-1.2 parts of dodonaea viscose root, 30-35 parts of rod chilli, 3-4 parts of yellow wine, 65-70 parts of pork rib, 8-10 parts of salad oil, 3-4 parts of peanut, 4-4.5 parts of soybean, 3-4 parts of almond, 7-8 parts of star anise, 6-7 parts of pepper, 9-10 parts of white sugar, 4-5 parts of potherb mustard, 6-8 parts of tomato, 10-12 parts of coconut juice, 300-320 parts of broad bean paste, 15-16 parts of rye flour, 0.1-0.2 part of lactic acid bacteria, 5-7 parts of fresh ginger and 8-9 parts of a nutritional additive. The pork rib chilli sauce is sweet, spicy and delicious, can increase appetite, and the formulation of the pork rib chilli sauce is scientific and reasonable, the addeded rye flour is rich in minerals, black pigment and the like, is nutritious and nourishing, and the added pork rib is pickled and fried, tastes delicious, and increases the flavor of the pork rib chilli sauce; in addition, the pork rib chilli sauce also contains a variety of herbal ingredients, and can reach the effects of clearing heat and removing toxicity, moistening dryness, lubricating intestines, tonifying kidney, warming spleen, dredging collaterals and regulating qi by regular consumption.