A foldable bed frame includes a plurality of support assemblies and a plurality of foldable assemblies, the support assembly includes a support pillar and a slidable component, the slidable component is slidably connected to the support pillar, the foldable assembly includes two connection rods intersecting with each other, the two connection rods of a same foldable assembly are located between two adjacent support pillars. An inflatable bed includes a bed body, an inflatable pump, a connection assembly and the foldable bed frame, the inflatable pump is mounted in the interior of the bed body.