The present invention relates to a lamp installation component comprising a clamping assembly for clamping on part to be clamped, and a mounting frame for assembling the lamp; the clamping assembly includes fixed part, abutting part, movable part and elastic part, and the fixed part is relatively fixed with the abutting part, and the movable part is slidably disposed between the fixed part and the abutting part, and the elastic part is held between the movable part and the abutting part, so that the movable part has a tendency to form a clamped state close to the fixed part; the mounting frame is fixedly connected to the abutting part. The lamp installation component has a simple structure and can be installed or disassembled with one hand, and is more convenient for use in a showcase or other small installation space.