Through point-survey for farmland shelterbelt system situation,windbreak effect,and yield performance in Jingdian's first and second irrigation areas,the functions of the shelterbelt and its ecological effects were analyzed.Results indicated that eco-protection effect was displayed remarkably in the shelterbelt's two side of the 0~6H.With the distance from the shelterbelt increasing,eco-protection efficiency weakened gradually.Eco-protection effect was improved with the increase in stand age.In the perfect area of forest network,agricultural production benefits were significant and wheat yield and maize yield were 18.3% and 13.7% more than those in control area.Thousand kernel weight in the forest network area increased by 15%～18%.However,the effect of yield-increasing by shelterbelt was reduced in unsound forest network.Results from the comprehensive analysis show that economic and ecological effects of farmland shelterbelt in the area should be further improved.