Bacteriostatic drug and preparation method thereof

The invention relates to a bacteriostatic drug and a preparation method thereof. The bacteriostatic drug is prepared from the following raw materials: radix sophorae flavescentis, melastoma dodecandrum, radix zanthoxyli, angelica, cudrania cochinchinensis and radix fici simplicissimae; when the bacteriostatic drug is in the form of gel, the preparation method comprises the following steps: adding the radix sophorae flavescentis to ethanol and refluxing so as to prepare an extract A; decocting the melastoma dodecandrum, the radix zanthoxyli, the angelica, the cudrania cochinchinensis and the radix fici simplicissimae in water so as to prepare an extract B; and preparing a blank matrix from carbomer, glycerol and propylene glycol, and adding vitamin E, eucalyptus oil, the extract A and the extract B to the blank matrix so as to obtain the bacteriostatic drug. The bacteriostatic drug disclosed by the invention is good in bacteriostatic effect, and the bacteriostatic drug is suitable for treating gynecologic inflammations; and the bacteriostatic drug, when in the form of gel, is quite low in irritation to vagina mucosa.