Transdermal analgesic free of toxic and side effects and preparation method thereof

The invention relates to the field of analgesics, in particular to a transdermal analgesic free of toxic and side effects. The analgesic is prepared from, by mass, 20-40 parts of realgar, 20-40 parts of olibanum, 20-40 parts of myrrh, 20-40 parts of indigo naturalis, 5-10 parts of borneol, 10-20 parts of fructus kochiae, 20-40 parts of cortex magnoliae officinalis, 10-30 parts of radix angelicae, 20-40 parts of mirabilite, 10-30 parts of resina draconis, 20-40 parts of alum, 10-20 parts of manyleaf paris rhizomes and 300-400 parts of vinegar. The invention further relates to a preparation method of the transdermal analgesic free of the toxic and side effects. The preparation method includes the steps of screening, washing with water, drying, smashing and uniform mixing. By means of the transdermal analgesic free of the toxic and side effects and the preparation method thereof, the transdermal therapy is adopted for the prepared analgesic, the analgesic can stop pain of painful portions, can be well absorbed,