The present invention belongs to the technical field of food and particularly discloses a buckwheat beef zongzi and a preparation method thereof. The buckwheat beef zongzi is prepared by using raw materials of glutinous rice, beef, buckwheat, coix seeds, red dates, soybeans and seasoning materials. By a reasonable compatibility and combining a regulation of technological parameters, the zongzi is prepared. The zongzi is rich in nutrition, extremely excellent in mouthfeel, and suitable for tastes of broad masses, at the same time can also improve gastrointestinal functions, promotes digestion and absorption of the glutinous rice, reduces incidences of gastrointestinal swelling and deposition, dyspepsia and other phenomena, and also has effects of improving immunity, enhancing appetite, etc.