The invention relates to a slidable-type automobile ceiling lamp which comprises a magnet, an automobile ceiling cushion, power lines and a lamp body. The magnet is connected with the upper surface ofthe automobile ceiling cushion through a limiting mechanism and can make transverse movement along the automobile ceiling cushion. The multiple sets of power lines are arranged in the automobile ceiling cushion and connected in parallel at equal distances, and each set of power lines comprises two conducting lines, wherein one ends of the two conducting lines are connected with an automobile power supply, and other ends of the two conducting lines are suspended. The lamp body comprises a lamp shell, an iron sheet, LED lamp bodies and leads; the lamp shell and the iron sheet constitute a closed shell; the iron sheet is slidably connected with the lower surface of the automobile ceiling cushion through the limiting mechanism; the LED lamp bodies are arranged in the shell constituted by thelamp shell and the iron sheet and connected with the leads; and the leads extend into the automobile ceiling cushion and can be connected with the suspended ends of all the sets of conducting lines toform loops. The automobile ceiling lamp can slide along the top of an automobile, the illumination range is large, and use is convenient.