[Objective] The cultivated land changes in the Hehuang Valley were studied in order to provide a basis for the study of the current situation of land use, agricultural development planning, sustainable utilization of cultivated land, and ecological environmental protection in the Hehuang Valley, and to provide references for the study of global cultivated land changes. [Methods] Remote sensing image processing, spatial statistics, and ArcGIS spatial analysis were used to analyze the pattern of cultivated land in the Hehuang Valley from multiple angles. The spatial-temporal evolution law of cultivated land in the Hehuang Valley from 1990 to 2018 was obtained. The relationship between the spatial change of cultivated land and special factors such as altitude and slope were analyzed. [Results] There was a significant change in the pattern of cultivated land in the Hehuang Valley from 1990 to 2018, and the cultivated land area increased. The growth rate of cultivated land was relatively stable from 1990 to 2000. After 2000, the rate of cultivated land reclamation accelerated, and more sloping cultivated land was developed towards the high slope area. After 2010, the cultivated land continued to develop towards the high altitude areas, and the increased rate of sloping farmland cultivation had a tendency to slow down. [Conclusion] From 1990 to 2018, the newly added cultivated land in the Hehuang Valley was reclaimed towards the high-altitude and high-slope areas, and the center of cultivated land shifted to the northwest.