The invention discloses a processing technology of composite dried beef having beef liver and tendon; and beef, beef liver, beef tendon, and casein are employed as original accessories. The processing technology comprises the following steps: boiling beef and cutting the boiled beef into small pieces; boiling beef liver and chopping the boiled beef liver into minced one, and then mixing the smallpieces of beef and minced beef liver to obtain a material having beef and liver; adding food-grade casein, white sugar, black powdered pepper and water into the material having beef and liver, and performing mixing to obtain a mixed material having beef and liver; stewing, moulding and slicing beef tendon; putting a piece of translucent tendon slice between two layers of the mixed material havingbeef and liver to form a three-layer overlapping complex; and carrying out hot-air drying, microwave drying, and sterilizing, and then performing packing by a vacuum film or packing in a monoblock candy manner to obtain a finished product. According to the invention, dried beef produced by the processing technology is rich in nutrition, and has a layered shape, distinctive flavor, as well as loose and flexible taste; besides, the product the dried beef is novel. Moreover, the composite dried beef having beef liver and tendon is easy to produce and demands of various consumers can be met. Cattle byproducts resources are utilized fully, which enables the benefit of the beef cattle industry to be promoted.