The invention discloses a medicament for first aid of heat stroke faint and a preparation method, belonging to the field of traditional Chinese medicines. Effective components of the medicament are prepared from the following raw materials: clinopodium herb, lotus leaves, Mesona chinensis, potentilla anserine, hairy mussaenda, Himalayan willow herb, codonopsis pilosula, Paederia scandens, eupatorium fortune, thesium chinensis, lemon, cymbopogon distans, schizonepeta, ilex latifolia thumb, mint and mume kernel. Medicinal materials selected by the medicament are properly matched and complement each other; the medicament has the efficacies of driving away summer heat and clearing collateral pathogen, clearing away heat and eliminating dampness, repelling foulness and regulating the middle warmer, promoting blood circulation to arrest pain, benefiting qi and blood, strengthening the spleen and stomach, refreshing, preventing dizziness and the like; various medicinal materials are combined to directly reach a lesion area; the medicament has the advantages of quick response, high cure rate, no toxic or side effects, safety and convenience for symptoms such as dehydration, chest pain, heat cramps, nausea, emesis, respiration disturbance, headache, shock and palpitation; in addition, the medicament is low in price and easy in preparation, and can be widely applied to clinical expansion.