The invention discloses a culture medium for identifying group-B streptococcus. The culture medium in per 100 ML water comprises, by mass, 3 g of proteose peptone, 0.2 g of KH2PO4, 0.4 g of Na2HPO4, 4 g of crude rice flour, 1.3 g of agar, 0.2 g of antibiotic, 0.2 g of brain-heart baptist extraction liquid medium and 2 g of horse sera. According to the culture medium, scribing detection can be directly carried out through a sampled to-be-detected swab; compared with the condition that pure bacterial strains need to be identified in the prior art, the detection accuracy and the detection efficiency of the group-B streptococcus are improved through the culture medium; An application method is convenient to operate, and special instruments and devices are not required; the culture medium is suitable for hospital and particularly suitable for applications of basic medical institutions, sampling work of samples is convenient, and meanwhile the detection effect of the group-B streptococcus is guaranteed.