In order to investigate the response of structure of plant community to extreme drought in different habitats in sandy land, the effects of extreme drought (rain reduction 60% and 60 days drought in growing season) on vegetation community characteristics and leaf traits in sandy grassland and fixed dunes were studied. The results showed that: (1) Habitat change has a significant impact on the above-ground biomass and leaf dry matter content (LDMC) of plant communities (P0.05); (2) Extreme drought treatment significantly affected plant community coverage, above-ground biomass, and LDMC (P0.05); (3) 60% rainfall reduction and 60 days of drought significantly reduced the vegetation coverage and above-ground biomass of grassland and fixed dunes, and 60 days of drought also reduced the plant height and LDMC of fixed dunes (P |