Abstract: The maintenance quality of cigar raw materials under different conditions of ordinary storehouses and constant temperature and humidity （temperature 21, 27 ℃; RH 60%, 65%, 70%） were compared. The results showed that under the conditions of the ordinary storehouse, temperature and humidity changed greatly, and the cigar raw materials were poorly maintained and mildewed to varying degrees; under the condition of constant temperature and humidity （27 ℃, 70%）, the moisture of cigar raw materials remained good, the color changed evenly, the chemical components of nicotine, total nitrogen, total sugar, chlorine and potassium changed significantly, and the sensory quality was the best. The conditions of ordinary storehouses were not suitable for storing and maintaining cigar raw materials. It was necessary to create constant temperature and humidity conditions for storing and maintaining cigar raw materials. The most suitable temperature and humidity conditions for storage and maintenance were （27±1） ℃,（70±5）%.

Key words: cigar raw materials, storage and maintenance, constant temperature and humidity, aging quality