The present invention belongs to the technical field of animal feed and discloses a licking brick and a preparation method thereof. The provided licking brick is prepared from molasses, sugar beet pulp and premix. According to mass percentages, the content of the premix is 4%; the content of the molasses and the beet pulp are 96%; and the mass ratio of the molasses to the sugar beet pulp is (1 : 3)-(3 : 17). The provided licking brick fully uses the resources of the sugar beet pulp, so that the licking brick is good in hardness performance, rich in fibers, minerals, vitamins and sugars, and comprehensive in nutrition, can provide energy and fibers for animals, especially ruminants, provide energy and fibers, increase feed intake, improve gastrointestinal microbial fermentation status, reduce toxin production and accumulation, provides vitamins and minerals necessary for animal growth and development, contributes to the growth and development of animals, and significantly increases the weight and milk production of animals.