The invention discloses beef jerky with purple potato and bean fragrance and a processing method thereof. The beef jerky is composed of the following raw materials by weight: 350-500 parts of beef, 35-70 parts of purple sweet potato, 20-40 parts of black potatoes, 30-50 parts of black beans, 10-15 parts of tomato seeds, 10-15 parts of pickled chilli, 30-50 parts of rice wine, 5-8 parts of pepper powder, 2-3 parts of Scammoniae radix, 1-2 parts of chachi citrus leaf, 2-3 parts of Origanum majorana, 1-2 parts of viola diffusa ging, 2-3 parts of flaxseed, 10-20 parts of salt and a proper amount of nutrition and health care liquid. The beef jerky with purple sweet potato bean fragrance prepared by the invention has the advantages of spiciness, crispness, deliciousness, refreshing, unique flavor, rich and balanced nutrition and high health value, can promote digestion and absorption, enhance immune function, restore the normal metabolic function, prevent cancer, protect heart, benefit brain, resist aging, and is beneficial to human health.