The invention relates to a fish tank device with an air purification function and belongs to the fish tank devices with environment protection effects. The fish tank device is characterized by comprising a base of a pot-shaped structure and a water pump connected to a cylindrical body shell through a hose, and a filtering cotton layer is arranged in the base; an air guide ring is arranged at an upper opening in the base; the cylindrical body shell is supported on the air guide ring; the air guide ring and the cylindrical body shell are matched to form an air channel and a water flow channel; the bottom of the cylindrical body shell is provided with a direct-current centrifugal fan, an air outlet and air returning openings; a negative pressure cavity is formed between the direct-current fan and the base; a planting basket is arranged in the cylindrical body shell, and particle adsorption matrixes are arranged in the planting basket. The fish tank device is convenient to operate, high in air purifying efficiency, attractive, durable, low in noise and low in maintaining cost; microorganisms existing in root beds of plants enable the particle adsorption matrixes not to lose efficacy forever, and thus the operation cost is reduced. The fish tank device can be used in cooperation with existing fish tanks of various structures.