A fluidizable medium support bed includes a bed body, a blower, a support board, a diffuser board and a metal frame. The bed body includes a support cavity for supporting a fluidizable medium. The bed body includes an expanded polystyrene (EPS) body and a coating covering all outer surfaces of the EPS body. The blower is connected to a bottom surface of the support cavity to provide an airflow. The support board has a plurality of ventholes and is disposed on the bottom surface of the support cavity. The diffuser board is disposed over the support board, wherein the diffuser board is permeable to air but impermeable to the fluidizable medium. The metal frame is disposed over a circumference of the support cavity.
