[Objective] We analyzed the grassland vitality by using the domestic GF-1 remote sensing imagery data in order to provide the scientific basis for preserving the sustainable development of animal husbandry and maintaining the regional ecological balance.[Methods] The typical steppe area of Manasi River basin in Xinjing region was selected as the study area. Based the "3S" technology, GF-1 remote sensing images in 2013 and 2014 were collected and the field survey was conducted to monitor the growth of grassland.[Results] The growth of grassland in 2014 was poorer than that in 2013, and the area of grassland with poor growth was 209 074.7 hm² in 2014 more than that in 2013, which accounts for 13.21% of the total area of grassland in the study area. Comparatively, the largest area with poorer grass growth in 2014 was temperate desert grassland, which was about 109 224.6 hm², accounted for 36.8% of the temperate desert grassland and 6.9% of the total grassland in the study area.[Conclusion] The monitoring accuracy of grassland vitality in the study area is high, which is more than 88.6%, indicating that GF-1 remote sensing imagery data is useful in the monitoring of grassland growth.