Abstract: Objective:To study the antibacterial activity and stability of garlic processing waste water,providing experimental basis for the development of natural resources,further decreasing the wastewater pollution. Methods:The broth microdilution method was used to analyze antibacterial activity and stability on common strains and drug-resistant strains. Results:When the medium contained 2.5%~3% garlic processing waste water,the growth of Escherichia coli,Staphylococcus aureus,Bacillus subtilis and the drug-resistant strains could be inhibited. Furthermore,the garlic processing waste water could maintain the antibacterial activity when heated to 70℃ or placed for 5 days at room temperature. Conclusions:Garlic processing waste water could be antibiotic alternatives used in animal fodder for inhibiting the growth of strains,thus protecting the poultry from infection,furthermore,the recycling of garlic processing waste water could decrease the waste pollution to some extent.