Based on historical meteorological data from 1961 to 2014 and rice (Oryza sative L.) growth observations from 6 agro-meteorological stations in Hainan, the impacts of climate warming on double rice growth period and its spatiotemporal variations were analyzed. The results indicated that the mean temperature during rice growing season increased in last 54 years in Hainan, with a rate of 0.21-0.3 ℃/10 a in early rice (especially for seedling stage), and a rate of 0.18-0.24 ℃/10 a in late rice (especially for mature stage). The rice growth periods in different areas varied significantly, the sowing date of early rice in eastern region was earlier than that in western region with a maximum interval of 55 days. After the harvest of early rice, it lasted 42 days at most when late rice began sowing. The precipitation and high temperature might be an explanation for the variation of rice sowing time. With temperature increased, the growth periods of early rice in most stations advanced, while the growth periods of late rice delayed. The duration of seedling stage and mature stage presented a shorten trend and had a negative correlation with the increased mean temperature. But the whole growth duration presented a slightly prolonged trend in some stations and a large variation existed. On the background of climate warming, the sowing date for early rice and late rice in Hainan may further advance and delay respectively in the future, rice varieties resistance to high temperature and drought are favored, which is benefit to relieving the heat injury.