The geobelt stress in geobelt-reinforced cushion is researched in this paper. Load tests of eight kinds geobelt- reinforced foundations are carried, the p-s curve and the ultimate bearing capacity of these foundations and the geobelt stress as the foundation reached the limit equilibrium are measured. The test data indicate that the geobelt stress determined the mechanical properties of geobelt-reinforced cushion. The geobelt stress relate with the geobelt’s layout. after theoretical analysis to mechanism of geobelt-reinforced cushion,put forward geobelt’s layout scheme, which can give full play to geobelt stress。