The invention provides medicinal liquor for treating lumbocrural pain caused by lumbar disc herniation and a preparation method thereof, and relates to the technical field of traditional Chinese medicines. The medicinal liquor includes the following raw materials (by weight): 8-12 parts of caulis spatholobi, 8-12 parts of radix cyathulae, 8-12 parts of kadsura pepper stem, 10-20 parts of lycopodium clavatum, 3-9 parts of Discorea nipponica Makino, 4-15 parts of smilax glabra, 5-16 parts of caulis akebiae, 5-14 parts of rhizoma cibotii, 11-20 parts of rhzizoma drynariae, and 1,000-1,250 parts of 60-degree pure grain liquor. The Chinese herbal medicines, which are used as the raw materials, are immersed in high-degree pure grain liquor through a cold immersion method to prepare the oral medicinal liquor, which is capable of promoting blood circulation to remove blood stasis and promoting qi circulation to relieve pain and has a significant effect of treating lumbocrural pain caused by lumbar disc herniation.