The invention discloses a foldable hanger. The hanger comprises a bracket, suspension arms mounted on two sides of the bracket and a hook mounted on the upper end of the bracket, the bracket comprisesa base and a cover, the base is provided with a sliding block, a guide rail penetrates through the base and the cover plate from front to back, the lower end of the hook is threadedly connected to the upper end of the sliding block and movably penetrates through the base, the end portion of the end, facing the sliding block, of suspension arm is provided with a circular portion, the circular portion is rotatably connected with a rotating shaft, the outer side wall of the circular portion is provided with a plurality of tooth heads, the outer walls of the two sides of the sliding block are provided with rack portions, the front side of the sliding block is provided with a limiting block, the bottoms of grooves in both sides of a long groove are provided with first sawtooth strips, two sides of the rear end face of the limiting block are provided with second sawtooth strips, the outer portion of the guide rail between the limiting block and the cover plate is sleeved with a first spring, and one end, located at the limiting block, of a push rod is in threaded connection with the limiting block; the two suspension arms inside the hanger can be gathered to facilitate the drying of clothes.