Disclosed is an easy-assembling folding bed, comprising a bed surface, bed side rods, and a footing component; the rods are disposed in parallel, the footing component is arranged in multiple groups, uniformly disposed and is engaged with the rods; the footing component comprises first and second components. The invention has simple structure, less materials, lighter weight and is convenient to carry. By rotating the second C-shaped engaging piece, the distance between the first and second C-shaped engaging pieces is changed, so the surface is tightened. The locking hook can automatically hook the locking fixing piece and lock it by the reset torsional spring, so the consumer can tighten and lock the surface. By twisting the hook to overcome the torsion of the spring and then rotating, the hook and the fixing piece are disengaged, and the footing component can be easily removed and folded to reduce the packaging volume.