Folding sofa bed

The utility model relates to the technical field of sofa beds, and provides a folding sofa bed, which solves the problem of poor use experience caused by structural defects of the conventional folding sofa bed, and comprises a sofa main body, the length direction of the sofa main body is defined as longitudinal direction, the width direction is defined as transverse direction, and the height direction is defined as vertical direction. The sofa main body is switched between a sofa state and a bed state, the sofa main body comprises a base, a backrest, armrests and limiting rotating parts, the armrests are arranged on the two longitudinal sides of the base and the backrest, the backrest and the base are rotatably connected with the armrests through the limiting rotating parts, when the sofa main body is in the sofa state, the backrest is vertically and obliquely arranged, and the backrest is vertically and obliquely arranged. The base is transversely arranged, the base and the backrest are overturned towards th