The invention discloses a beverage for preventing and treating respiratory diseases caused by haze. The beverage is prepared from the following raw materials in parts by weight: 20-30 parts of mulberry leaves, 10-20 parts of fresh reed roots, 10-20 parts of sweet almonds, 10-20 parts of lilies, 10-20 parts of radix glehniae, 10-20 parts of astragalus membranaceus, 7-15 parts of platycodon grandiflorum, 6-12 parts of radix ophiopogonis, 6-12 parts of pericarpium citri reticulatae, 5-10 parts of galangal, 5-10 parts of thunberg fritillary bulb, 5-10 parts of honeysuckle, 3-6 parts of bitter almonds and 0.5-1 part of menthol. The invention further discloses a preparation method of the beverage. The beverage is simple to prepare, can be used for comprehensively benefiting vital energy, tonifying deficiency, diffusing lung, moistening dryness, reducing sputum, relieving cough, stopping pain, removing stasis and relieving sore-throat, is beneficial for discharging harmful inhaled substances, and has a very good effect on symptoms such as cough and excessive phlegm caused by the haze.