This paper took Luoyang city as an example,using the CGE Model of cultivated land area and grain security is constructed by 2020 as the base period.The results showed that the yield of grain crops was 230.21 when the area of cultivated land decreased by 1％,the yield of grain crops was 2.391 6 million tons when the area of cultivated land decreased by 3％,the yield of grain crops was 2.359 million tons when the area of cultivated land decreased by 5％.%以洛阳市为例,以2015年为基期,以2020年为模拟期,构建耕地面积与粮食安全的CGE模型.研究发现:洛阳市耕地面积下降1％情况下,粮食作物产量为239.61万t,耕地面积下降3％情况下,粮食作物产量为235.59万t,耕地面积下降5％情况下,粮食作物产量为230.21万t.
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