A block-type ecology-imitating pond breeding and fry-rearing device. A pond is divided into a breeding block (1), a hatching block (2) and a fry-rearing block (3), which are connected in sequence, wherein an aerating apparatus (4) is arranged in the pond. A first mesh frame (5) is provided between the breeding block (1) and the hatching block (2), and a second mesh frame (6) is provided between the hatching block (2) and the fry-rearing block (3). Air outlets of the aerating apparatus (4) are provided in the breeding block (1), the hatching block (2) and the fry-rearing block (3). A block-type ecology-imitating pond breeding and fry-rearing method. The pond is divided into three functional blocks with specific ecological environments, and block function optimization is carried out, thereby accurately satisfying the ecology-imitating conditions of natural maturation of the gonad, natural spawning, hatching and fry rearing, and markedly increasing the spawning rate, the hatching rate and the fry rearing rate; and the three blocks are orderly and automatically fused by means of small circulation and large circulation and are finally integrated into a unidirectionally circulating high-density water fry-rearing system, thereby comprehensively improving the efficiency of breeding and fry-rearing.
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