为摸清广州市耕地非粮化态势，降低非粮化造成的耕地安全威胁，以镇街为基本评价单元，测算其非粮化率，并采用空间自相关分析方法，探究耕地非粮化空间分布规律。结果表明，广州市2019年耕地非粮化面积为434.51 km²，非粮化率为65.7%，耕地非粮化现象普遍存在；耕地非粮化呈现市中心区域高、外围区域低的空间集聚特征，非粮化面积主要集中在番禺区南部、南沙区北部、白云区北部、增城区南部等区域；耕地非粮化率呈现中心高，向南依次低、高，向北依次高、低的环带空间集聚特征，高非粮化率主要集中在番禺区南部、南沙区、黄埔区、白云区等区域。

In order to understand the trend of non-grain cultivated land in Guangzhou City and reduce the threat of non-grain cultivated land,taking towns and streets as the basic evaluation unit, we calculated their non-grain cultivated land rate, and used spatial autocorrelation analysismethod to explore the spatial distribution rules of non-grain cultivated land. The results showed that in 2019, the area of non-grain cultivatedland in Guangzhou City was 434.51 km², with a non-grain cultivated land rate of 65.7%. The phenomenon of non-grain cultivated land waswidespread. The spatial distribution of non-grain cultivated land showed a high concentration near the urban center and low concentration in theperipheral areas. The non-grain cultivated land area is mainly concentrated in the south of Panyu District, the north of Nansha District, the northof Baiyun District, and the south of Zengcheng District. The spatial distribution of non-grain cultivated land rate showed a central high,followed by low and high in the south, and high and low in the north. The high non-grain cultivated land rate was mainly concentrated in thesouth of Panyu District, Nansha District, Huangpu District, Baiyun District, and other areas.