The invention discloses a novel arrow tail lamp, comprising an inertial on-off loop formed by the connection of a shell, a low voltage light source and an inertia switch, the inertial on-off loop can be switched between a closed circuit and an open circuit under the function that the inertia switch is functioned by the inertia in a same direction, and an inertial on-off loop formed by the low voltage light source and the power supply through the inertia switch, is arranged in the shell. The novel arrow tail lamp can be started depending on the inertia when the arrow is shot, therefore arrow shooting process is a process of starting the novel arrow tail lamp; furthermore, after the user swings the arrow tail downwards, the disconnection of the on inertial on-off loop can be realized, so that the novel arrow tail lamp is convenient and quick to use.