The invention discloses a double-layer composite pet cage. The double-layer composite pet cage comprises an upper bedroom layer and a lower living layer, wherein the bedroom layer and the living layer are separated through a separating plate between the bedroom layer and the living layer, a gap is formed between one end of the separating plate and a cage body of the double-layer composite pet cage, a feeding trough is arranged at a corner of the living layer, a pulling door is further arranged between the double-layer composite pet cage and one side, which is provided with the gap, of the separating plate, and the top part of the double-layer composite pet cage is provided with a lifting handle. According to the double-layer composite pet cage disclosed by the invention, the structure is simple, the setting is reasonable, a hierarchical design is adopted, the cleanliness, the sanitation and the tidiness of the double-layer composite pet cage can be ensured, the treatment is convenient, meanwhile, a comfortable and warm resting environment of a pet can be ensured, and the safety is good.