In tube tests Escherichia coil, Salmonella choleraesuis, Pasteurellamultovida, Erysipelothrix rhusiopathiae and Pseudomonas aeruginose were killedin 1%~3% ferrous sulfate solution within 5~10 minutes, Streptococcns pyoge-nes and Staphylococcus aureus were killed in 4%~7% ferrous sulfate solution un-der 4-25℃. But bacillus was not sensitive to it. In simulated tests all the st-rains tested but bacillus were highly sensitive to it. The experiment has prov-ided scientific bases...