The invention particularly relates to an air purification device decorated with a cold light slice. The air purification device decorated with the cold light slice comprises a frame, a transparent panel, the cold light slice, an air filter screen and a back plate, wherein the transparent panel, the cold light slice, the air filter screen and the back plate are installed on the inner side of the frame in an embedded mode, the cold light slice and the air filter screen are sequentially arranged between the transparent panel and the back plate, the cold light slice comprises a cold light slice body, transparent thermal insulating layers, edge sealing layers, a controller and an external power line connected with the controller, an air inlet is formed in one side face of the frame and betweenthe cold light slice and the air filter screen, the other side of the frame is provided with an air outlet which is formed between the air filter screen and the back plate, an air inlet fan is arranged at the air inlet, and an air outlet fan is arranged at the air outlet. The air purification device decorated with the cold light slice has the functions of purifying air, decorating and serving as anight light, occupied space is small, and the indoor attractiveness is not affected.