The invention discloses a heat reserving pot bottom arranged on the bottom of a pot; the pot bottom comprises a pedestal, a flame guiding block and a plurality of insulation blocks; the pedestal is provided with a bottom plate, a fire inlet arranged in middle of the bottom plate, and a plurality of joint ribs arranged in the bottom plate and surrounding the fire inlet at intervals; each joint rib is provided with more than one bosses on the top surface in a protrusion manner; the flame guiding block is matched with the fire inlet, and abuts against the bosses; the insulation blocks are combined on the pedestal and surround the fire guiding block, and abut against the bosses; the heat reserving pot bottom can concentrate fire so as to improve heating efficiency, can keep the furnace heat for insulation, thus realizing fast heating, fire-free insulation and fire-free boiling effects that cannot be realized by existing pot ware.