Abstract: The data of forage phenomenon and production in the last 45 years in the typical prairie area was used to analyze climate change and its impacts on forage production.by using mathematical statistics method.The results showed that the drier and warmer trend was significant in the typical steppe area.The average temperature increased by 0.7℃ and 1.6℃ in recent 20 and 45 years respectively.The annual precipitation decreased generally.It dropped 40mm and 27mm in the recent 20 and 45 years respectively.The precipitation was the dominant factor constrained the production potential in this area.The average forage productivity decreased 200.2kg/ha during last 45 years.The rate of the climate resource utilization was with 37.3%.The model based simulation results showed that the potential of forage production increased 47.9kg/ha per year and 12.1kg/ha per year separately,when the temperature decreased 1.0℃ and rainfall increased 1 mm respectively.

Key words: Forage potential climate productivity, Forage potential climate productivity, Rate of climate resource utilization, Climate change, Typical prairie area