With the time series data during the period of 2000-2011,dynamic analysis was used with spatial models on expansion characteristics of construction land in Chizhou City,Anhui Province.Co-integration test,Granger causality test and vector error correction model approach in econometric analysis were adopted to quantitatively measure the driving factors of built-up land expansion.The results showed that:(1)Between 2000and 2011,annual average expansion speed of construction land was 3.49%in Chizhou City while it was 1.70% and 4.59%in 2000-2005and 2006-2010respectively;(2)Economic growth and fixed asset investment had an unidirectional causality to construction land expansion;(3)In a long term,the elastic coefficient of economic growth and fixed asset investment to construction land expansion was-3.663 8and 2.264 7respectively;in a short term,it was-0.312 3and 0.328 7respectively,which indicated that the important way to slow down the construction land expansion is to increase total economy,improve the quality of economic operation and control the scale of fixed asset investment.