Self leveling deck pedestal is a support system for outdoor floor laying, which can be automatically adjusted according to the height difference of the terrain, so as to balance the support board and achieve a flat and stable ground. The on-site assembly method adopted by self leveling decking pedestal can greatly reduce the workload and time cost of installation, while having excellent aesthetics and functionality. Self leveling pedestals for decking are suitable for various outdoor places where the slope of the terrain does not exceed 5%.