The extract of Schizonepeta tenuifolia (Benth.) Briq. was extracted from the whole grass of Schizonepeta tenuifolia (Benth.) Briq. which was a labiate plant. It contained essential oil. The extracts also had certain inhibitory effects on Bacillus anthracis, Streptococcus B, Typhoid bacillus, dysentery bacillus, Pseudomonas aeruginosa and human tuberculosis.