Abstract: The paper aims to understand the distribution rule and trend change of the normalized difference vegetation index(NDVI) and its response to climate change in the West Liao River Basin.Linear regression and correlation analysis were used to analyze the delay of NDVI and meteorological factors in each month of the growing season, and the correlation between NDVIs of different vegetation types and meteorological factors in the 10 km buffer zone around the meteorological station based on the daily meteorological data of 11 meteorological stations and MODIS normalized difference vegetation index data set from 2000 to 2018.The results showed that the annual temperature, the highest temperature, the lowest temperature, and the precipitation in the West Liao River Basin all saw an uptrend.The NDVI of different vegetation types was on the rise in the West Liao River Basin, and the vegetation was improved.The increased rate of cultivated land was the largest, which benefited from the improvement and promotion of agricultural activities.The spatial distribution of NDVI was characterized by low value in the middle and high value around the West Liao River Basin.NDVI in each month lagged obviously behind precipitation in the growing season with a lag period of one month, only the NDVI in August lagged behind the average and maximum temperatures in the previous month.NDVIs of different vegetation types were closely related to the average and maximum temperatures in the West Liao River Basin.There were better correlations between NDVI of cultivated land and meteorological factors.The results provide a reference for maintaining the balance of the ecosystem in the West Liao River Basin.