The invention relates to a cordyceps liquid spawn culture medium, which is mixed and prepared by 30 to 100 gram glucose, 3 to 10 gram peptone, 0.5 to 1.1 gram multiplex vitamin, 5 to 12 gram multiplex mineral matters and 961.5 to 876.9 gram water, wherein, the vitamin mainly comprises VA, VB1, VB2, VB5, VB12, VC and VE which are prepared according to the ratio of 1 to 1; the mineral matters mainly comprise calcium hypochlorite, green vitriol, zinc selenides, sodium chlorides, potassium nitrates, magnesium sulphates, manganese sulphates, ammonia sulphates and potassium iodides which are prepared according to the ratio of 1 to 1 or are mixed and prepared by 2 gram calcium hypochlorite, 0.2 gram green vitriol, 0.2 gram zinc selenides, 0.5 to 1 gram sodium chlorides, 3 gram potassium nitrates, 3 gram magnesium sulphates, 0.2 gram manganese sulphates, 0.3 gram potassium iodides and 2 gram ammonia sulphates. The invention concentrates effective nutrition and medicinal compositions in cordyceps, and reduces the dosage but does not reduce the effect. The cordyceps liquid spawn culture medium can save 90 percent labor and save 90 percent energy, is environment-friendly without refuses; moreover, the seed production technology is simplified, which contributes to the popularity and promotion of cordyceps seed production and culture technologies and is favorable for the development of cordyceps project and simultaneously avoids large-area pollution loss due to various reasons of liquid spawn.