粮食是人类赖以生存和发展以及支撑国民经济发展的物质基础，进一步揭示粮食生产基地粮食生产的时空变化特征，可为提高生产面积和产量提供依据。文章基于MODIS数据集获取2000—2022年引江济淮沿线优质稻麦区NDVI，采用最大合成法和均值法以及S-G滤波和多种空间分析方法定性定量地分析了沿线NDVI的时空演变格局。结果表明，引江济淮沿线优质稻麦NDVI月均值有明显差异，水稻在6—8月为快速增长期，小麦在2—4月和6—8月为快速增长期。引江济淮沿线优质稻麦NDVI年均值均呈现波动上升趋势。引江济淮沿线优质稻区主要集中分布在引江济淮沿线县的东南部；优质麦区集中分布在引江济淮沿线县的西北部，在东南部零星分散，并形成团型集聚区。引江济淮沿线优质稻麦区NDVI在空间上呈现明显的集聚特征，且集聚性随着时间推移逐步增强。引江济淮沿线优质稻NDVI高聚类区逐步从引江济淮沿线县东南部转移到中部，由开始的零星分散逐步发展到集中聚集在紧邻于引江济淮沿线的区县。

Grain is the fundamental material basis for human survival and development, as well as for the national economy. Further analysis of the spatio-temporal characteristics of grain production in grain production bases can provide a basis for improving grain production area and output. The MODIS data set was employed to obtain NDVI values from 2000 to 2022. The spatial-temporal evolution pattern of NDVI along the Yangtze-to-Huaihe Water Diversion Project (YHWDP) area was analysed qualitatively and quantitatively using a maximum synthesis method, mean value method, S-G filtering and various spatial analysis methods. The results are presented below. There were significant differences in the monthly NDVI values of high-quality rice-wheat along the YHWDP area. The growth period for rice was rapid from June to August, while that for wheat was rapid from February to April and from June to August. The annual NDVI average of high-quality rice and wheat along the YHWDP exhibited a fluctuating upward trend. The high-quality rice areas along the YHWDP area are mainly distributed in the southeast of the counties along the YHWDP area. In contrast, the high-quality wheat area is concentrated in the northwest of the counties along the YHWDP area, with scattered distribution in the southeast, forming a cluster area. The NDVI in the high-quality rice and wheat area along the YHWDP demonstrated a discernible tendency towards spatial aggregation, with this tendency becoming increasingly pronounced over time. The area of high-quality rice with the highest NDVI values along the YHWDP gradually shifted from the southeastern part of the counties along the YHWDP to the central part. Initially, the high NDVI cluster of high-quality rice was dispersed, but over time, it became concentrated in districts and counties adjacent to the YHWDP.