The invention relates to lamp components, a lamp bracket and a lamp. The lamp comprises the lamp bracket, and the lamp bracket is formed by splicing the lamp components; each lamp component comprise atrunk, at least two branches are arranged at the end part of a first end of each trunk in an external diffusion manner, and a power connection part is arranged at a second end of each trunk; the tailend of each branch is provided with an installation part which can be used for installing a light source and being in butt joint with the power connection part of another lamp component in a matchedmode; and in use, the power connection parts are electrically connected with a power supply, and each installation part is provided with the light source or in butt joint with the power connection part of another lamp component in a matched mode. According to the lamp components, the lamp bracket and the lamp, various kinds of changeable lamps can be simply spliced according to personal interests.