Conjunctivitis is a common ophthalmic disease with a variety of causative factors that require symptomatic treatment with different medications depending on the cause. The surface of the conjunctiva is mostly exposed to the outside world and is susceptible to external environmental stimuli and damage, and the conjunctival capsule is susceptible to pathogenic microbial infections due to the appropriate temperature and humidity. The principles of treatment for conjunctivitis are to remove the cause, control the inflammation, and stop its spread. The main pathogens of conjunctivitis infection include the following, namely bacterial, viral, and chlamydial. And immune conjunctivitis is also not uncommon. For bacterial conjunctivitis: mainly local application of anti-inflammatory eye drops, commonly used are quinolones and aminoglycosides eye drops, and if the symptoms are severe, systemic application of antibiotic treatment if necessary, as well as good disinfection and isolation to prevent infection. Viral conjunctivitis: mainly local application of acyclovir, ganciclovir, interferon and other antiviral eye drops, hormonal eye drops can be applied if necessary, also do a good job of disinfection and isolation to prevent infection. Chlamydial conjunctivitis: mainly local application of rifampicin, sulfonamide ophthalmic drugs, serious cases can be systemic application of polytetracycline, erythromycin. Immune conjunctivitis: mainly local application of anti-allergic or hormonal eye drops, and if necessary, local application of immunosuppressants. Therefore, there is no best eye drops for conjunctivitis, only effective and symptomatic eye drops.