The invention discloses a processing method of preserved braised beef. The processing method comprises the following steps: carrying out unfreezing and cleaning, mixing, pickling, baking, preparing braising soup bases, carrying out braising by virtue of a cold-hot conversion method, selecting, removing impurities, carrying out step cooling, slicing, carrying out packaging, and the like. Accordingto the processing method, braising is carried out by virtue of the cold-hot conversion method, so that the braised beef has relatively good tasty effect; the cooling temperature during the braising through the cold-hot conversion method is controlled in a step manner, so that relatively good quality of the braised beef is well obtained; and the prepared braised beef has two flavors of braised products and baked foods, the flavors are stereoscopic and gentle, the taste is specific. Two specific compound mixtures can penetrate into beef, so that the tissue structure of the beef can be improved,and the synchronous antibacterial effect can be achieved.