INTRODUCTIONrnNanometer technology is a new cross-linked progressing science. It has quickly be applied into biology or pharmacy field generally for its definite antibacterial effect. We have proved in above paper that the maximum antiseptic concentration is 109 Cfu/ml in 33 ordinary strains isolated from 11 genera. In this experiment, we continue to explore the minimal bacteriostasis of nanometer materials. Through reports of maximal bactericidal concentration and minimal bacteriostasis, we can confirm bacteriostasis effect of nanometer materials and do some preparations on clinical application.rn