Atropine is mainly used for pupil dilatation, optometry and iridocyclitis in adolescents. Atropine blocks acetylcholine, which paralyzes the pupillary sphincter and ciliary muscle and causes pupil dilation for up to 10-12 days. Children in general are prone to toxic reactions to these drugs, causing flushing and increased heart rate. Atropine is a parasympathetic drug extracted from plants such as tomato, which can reduce and release the parasympathetic activity of sympathetic-controlled muscles, and glands, and ciliary muscle contraction can regulate the shape of the crystal, allowing people to see far and near objects. It is generally believed that pseudomyopia is formed when the ciliary muscle is in long-term spasm and cannot relax, so this is when atropine is used to drop the eyes to relieve pseudomyopia and treat true myopia. Long-term use is difficult due to the side effects of atropine, which is still only a preventive rather than a curative drug for myopia, and myopic eye deepening will continue after stopping use. In addition, atropine belongs to the m-cholinergic receptor antagonist, the main effect is to release the smooth muscle spasm of the gastrointestinal tract, dilate the pupil, inhibit glandular secretion, also can act on blood vessels, smooth muscle, dilate blood vessels, improve microcirculation, also can excite or inhibit the central nervous system. The main uses also include the use of large doses to relieve the symptoms of organophosphorus poisoning, and because of the antispasmodic effect on the smooth muscles of the gastrointestinal tract, atropine can be administered orally or intramuscularly to relieve the symptoms of colic when gallbladder stones with biliary colic or ureteral stones are present. The use of atropine before surgery can inhibit the secretion of salivary glands and prevent excessive gland secretion during surgery, which can cause aspiration by mistake.