The invention relates to a traumatic injury analgesic cataplasm and a preparation method thereof, the traumatic injury analgesic cataplasm is produced by formula raw materials of traumatic injury analgesic paste according to the process of the cataplasm and comprises a hydrophilic gel matrix, a non-woven fabric back-up material and a traumatic injury analgesic paste drug, and the traumatic injury analgesic paste drug consists of ground beetle, crude kusnezoff monkshood, nux vomica (stir-fried), rhubarb, rosewood heart wood, shinyleaf pricklyash root, baical skullcap root, amur corktree bark, giant knotweed rhizome, borneol, camphor, menthol, peppermint oil and methyl salicylate. The soluble matrix of the cataplasm has good compatibility with water-soluble and fat-soluble drugs, and the drug loading of the matrix is great, thereby being very applicable to medication features of multiple components and large dose of traditional Chinese medicine; compared with an adhesive plaster agent, the cataplasm is easier to soften the horny layer of skin, is conductive to transdermal absorption of the drug and has better air permeability, adhesion to the skin and moisture retention, thereby having the advantages of comfortable use, small irritation to the skin, repeated tearing and pasting, no pollution of clothes, no residue, no pain when tearing after the use and the like.