The invention relates to a micro cut-off switch indicating lamp which comprises a shell and an indicating lamp circuit board which is arranged in the shell, wherein the indicating lamp circuit board is provided with two electric springs which extend out of the shell; and a self-locking fastening mechanism which extends out of the shell and is used for fastening the micro cut-off switch indicating lamp in a mounting escape hole of a micro cut-off switch is arranged in the shell. The micro cut-off switch indicating lamp is fixedly fastened in the mounting escape hole of the micro cut-off switch by utilizing the self-locking fastening mechanism, so that cable-free electrifying of the indicating lamp is conveniently realized; meanwhile, the problems that the indicating lamp can not be fixedly mounted and the uninterrupted load maintenance can not be realized are simultaneously solved, the mounting efficiency of the indicating lamp in a power distribution equipment system is greatly improved, the connecting stability of the indicating lamp is improved, and the instability of the equipment caused by wiring of the indicating lamp is reduced; and therefore, the investment of the system and the maintenance cost are saved.