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The preparation technique and properties of Ag-type inorganic antibiotic material carried by Al2 O3 were studied. The results show that the material has good antibiotic and safety properties, the acute toxicity taken by stomata is LD50 ＞ 8 000 mg/kg (little and big white rats), and the normal quantity in subacute toxicity test is the optimal sintering temperature is from 1 000 ℃ to 1 100 ℃.