Abstract: In order to study the effect of climate change on the growth and development of the main crops in Qingdao, using the observational data of the growth period of winter wheat during 1982-2014 and summer corn during 1986-2014 from Qingdao City Jiaozhou agricultural meteorological observation station and the meteorological data of the same period, the growth period trends of the two crops and their responses to climate change were analyzed. The results showed that the growth period of winter wheat in Qingdao City was delayed from sowing to reviving and the tillering stage delay was the most obvious. The growth stages from getting up to booting were in advance; the rise of the average temperature during the growth period was the main reason for the shortening of the whole growth period of winter wheat. The growth stages of summer corn from sowing to seven leaves were in advance, while those from jointing to maturity stage were delayed, the delay of the maturity stage was of the maximum degree. The decrease of precipitation in June was the main reason for the delay of summer corn maturity and the extension of the whole growth period. In the future 10 years, the climate change will lead to the mature period in advance and the shortened whole growth period of winter wheat, and the delay of maturity and the prolonged whole growth period of summer corn.