Sofa device convenient to splice and assemble

The utility model discloses a sofa device convenient to splice and assemble, which comprises a first sofa, one side of the first sofa is movably connected with a second sofa, a push-and-pull plate is slidably mounted in the second sofa, an air cylinder device and a lifting device are fixedly mounted on the upper surface of the push-and-pull plate, a base plate is fixedly mounted on the upper surface of the air cylinder device, and the lifting device is fixedly mounted on the upper surface of the base plate. The upper surface of the base plate is fixedly connected with a splice plate; a third sofa is movably connected to one side of the second sofa, and a sofa cabinet is slidably mounted on one side of the third sofa; the combined sofa is formed by combining the first sofa, the second sofa, the third sofa and the sofa cabinet, so that the splicing and carrying processes are relatively convenient; when the sofa is used, the push-pull plate in the second sofa is pulled out through the pulley groove, and the spli