The invention discloses felon herb leaf sausage and a preparing method thereof. The felon herb leaf sausage comprises raw materials including pork, oat powder, felon herb leaves, astragalus, atractylodes, salvia miltiorrhiza, rhizoma alismatis, cassia occidentalis, medlar, liquorice, cassia twig, ginger blocks, green onion sections, star anise, kaempferia galanga, cinnamon, fennel, amomum tsao-ko, Chinese prickly ash, clove, amomum villosum, cardamom, lysimachia sikokiana, bay leaves, salt, monosodium glutamate, red yeast rice, cooking wine, sucrose and an appropriate amount of pure water. The pork and the oat powder serve as raw materials, the felon herb leaves and other Chinese herbal medicine components are added, the felon herb leaf sausage is abundant in nutrition, unique in taste, convenient to eat and easy to store; felon herb is bitter in taste, pungent and gentle, nutrient in the felon herb enters the spleen, the liver and the kidney, and the whole felon herb can serve as medicine and has the functions of warming channels, dewetting, dispelling cold, stop bleeding, diminishing inflammation, relieving asthma and relieving a cough and the antiallergic function; the astragalus, the atractylodes, the salvia miltiorrhiza, the rhizoma alismatis, the cassia occidentalis, the medlar, the liquorice, the cassia twig and the like have the functions of supporting the healthy energy, tonifying spleen, relieving internal heat or fever, clearing stasis and lowering the adverse Qi; the fermentation method is adopted, the nutritional ingredients of the Chinese herbal medicine are remained, and the fermentation taste is obtained.