A foldable ceiling lamp includes a wire connection box and a limiting disk, and a lamp rod. The wire connection box includes an upper cover and a wire connection box body. A gap is formed between the upper cover and the body for being inserted by a supporting plate of the lamp rod. The limiting disk has a plurality of positioning pivotal holes formed on the limiting disk near an edge of the limiting. Each of the positioning pivotal hole is around by a plurality of embedding holes. A bottom of the lamp rod is installed with a plurality of stepped supporting plates. The supporting plates are installed on the positioning pivotal holes of the limiting disk by a pivotal stud. When the supporting plate rotates around the stud, the convex portion of the supporting plate is embedded into one embedding hole. Thus, the lamp rod is rotatable.