The invention discloses a circulating type high-heat-preservation concrete block and a preparation method thereof, belongs to the technical field of concrete blocks, and can realize that a mortar pre-filling groove is formed in a block body and a circulating heat preservation component is embedded and mounted, so that on one hand, the strength of the block body and the connecting strength betweenadjacent block bodies can be improved; and on the other hand, on the inner side and the outer side of the interior of the block body, heat absorbing nets are formed through heat absorbing wires to absorb heat on the block body and then transferred to the inner heat absorbing balls, through sensing and comparison of the inner heat absorbing balls and outer heat dissipating balls to heat, after theinner heat absorbing balls absorb enough heat, due to the fact that the effect of the magnetic field triggered by a high-temperature side is stronger, circulation heat conduction connection is forcibly established, absorbed heat is returned to an original place, heat conduction connection is disconnected in the normal state, the excellent heat preservation performance of the block body is fully guaranteed, and meanwhile high strength and long service life are provided.