Multifunctional artificial fish reef

The invention discloses a multifunctional artificial fish reef, and aims to provide an artificial reef which is beneficial to formation of different flow field environments with upwelling, can raise nutrient substances deposited at the seabed, can improve the primary sea field productivity near the artificial reef and can provide sufficient feed to fishes. The multifunctional artificial fish reef comprises a reef body, an inner reef cavity and a plurality of inlets and outlets, wherein the inner reef cavity is arranged inside the reef body; the plurality of inlets and outlets are formed in the side surface of the reef body and are communicated with the inner reef cavity; the outer side surface of the reef body extends downwards from top to bottom towards the outer side of the reef body in an inclined manner; a partitioning plate which extends upwards and downwards is arranged inside the inner reef cavity.