The invention discloses a preparation method for an external 
medicine for nerve post-injury and components of the external 
medicine. The preparation method for the external 
medicine for the nerve post-injury comprises the following steps: fetching 10 to 30 parts of 
solanum lyratum 
thumb, 6 to 12 parts of glossy 
privet fruit, 6 to 12 parts of 
Cassia alata L, 1 to 5 parts of 
Viburnum foetidrm Wall, 3 to 9 parts of 
Amblystegium serpens, 15 to 25 parts of medicinal 
cyathula root, 6 to 12 parts of 
erycibe obtusifolia benth, 2 to 20 parts of securinega suffruticosa, 6 to 12 parts of bighead atractylodes 
rhizome, 2 to 10 parts of scandent 
schefflera stem and leaf, 6 to 12 parts of 
Acmella ciliate, 1 to 5 parts of 
glechoma longituba, 2 to 10 parts of fresh ginger, 1 to 5 parts of lobed kudzuvine root, 1 to 9 parts of mint, 5 to 15 parts of fructus 
forsythia, 3 to 9 parts of Poria cocos and 3 to 9 parts of 
Schisandra chinensis, mixing, adding water for decocting; removing filtrate after 30 minutes; adding water to dregs of decoction to go on decocting for 20 minutes, and then fetching filtrate, combining the filtrate of the two times, concentrating, 
drying and crushing, and then, mixing for applying. The external medicine disclosed by the invention has a unique stasis removal effect, is capable of promoting growth and development and axonal regeneration and the maintenance of the 
synaptic function of nerve fibers, is capable of deciding and inducing nervous processes to grow along a correct direction in 
redevelopment and regeneration of a 
nervous system, cannot cause normal axons to sprout, also has multiple effects of stopping pain, dissipating 
blood stasis and promoting 
blood circulation to remove meridian obstruction and is in favor of the treatment and 
recovery of the nerve post-injury.