Drought is a meteorological disaster that has a large impact on farmland productivity and is transforming into “flash drouhgts”. In this study, we analyzed the flash drouhgts sensitivity of farmland productivity in the Region of Cheng-Yu during the year of flash drouhgts based on the travel theory and vegetation sensitivity index by using the data of soil moisture (SMI), gross primary productivity (GPP) and crop types from 2000 to 2020. The results show that:1) the duration of flash droughts and the interval between flash droughts in the Region of Cheng-Yu in 2010 were longer than that in 2006, the intensity of flash droughts and the severity of flash droughts were higher than that in 2006, and the difference in the number of flash droughts in the two flash droughts years was small, but there were some differences in spatial distribution; 2) in 2006, the high sensitivity of farmland in the Region of Cheng-Yu was centrally located in the areas of Mianyang, Chengdu, and Ziyang, while the rest of the area was medium-sensitive and low-sensitive farmland. and low-sensitivity farmland in the rest of the region, while in 2010 there was a clear pattern of “high in the west and low in the east”. In 2010, there was a clear pattern of “high in the west and low in the east”; 3) the average sensitivity of rice-type farmland productivity to flash droughts was low, and the types of farmland with the highest sensitivity to productivity in the two years of flash droughts were all other crop-type farmland; and 4) the duration of sudden drought and the severity of flash droughts were the main factors affecting the sensitivity of farmland. The results of this study can deepen the understanding of the impact of flash droughts on farmland productivity, and provide scientific support for the prevention and control of flash droughts and agricultural structure adjustment in the Region of Cheng-Yu