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This utility model relates to the field of mattresses, and more particularly to a composite mattress, comprising several mattress bodies arranged sequentially front to back. A rectangular frame is fixedly mounted on the upper and lower center of the side circumference of each mattress body. Screw holes are embedded on the left and right sides of the front and rear ends of the rectangular frame. Connecting plates are connected to the outer sides of the rectangular frames of the front and rear mattress bodies, and several through holes are spaced apart on the connecting plates. One through hole at each end of the connecting plate coincides with a screw hole, and bolts are screwed into both the screw hole and the through holes. A single, integral memory foam pad is laid beneath each mattress body. The beneficial effects of this utility model are: this composite mattress is divided into multiple sections, and its angle and firmness can be adjusted, effectively solving the problem that previous mattresses could not provide strong contact with certain parts of the body, easily becoming unsupported, i.e., they could not provide comprehensive support for the spine; it is suitable for a variety of people.