The invention relates to a preparation device of lotus-type porous metal. The preparation device comprises a furnace body, an insulating forming chamber, a heating body, a crucible and a pull unit, wherein the furnace body comprises a central furnace body and a lower furnace cover; the insulating chamber is arranged inside the central furnace body; the heating body is arranged inside the insulating forming chamber; the furnace body is divided into a heating chamber and a cooling chamber by the heating body and the insulating chamber divide; the crucible is used for holding metal to be smelted; the pull unit is used for controlling the crucible to be positioned inside the heating chamber or the cooling chamber. In addition, the invention further provides a method for preparing the lotus-type porous metal by using the preparation device of the lotus-type porous metal.