The invention discloses a fault indicator for a distribution line. The fault indicator for the distribution line comprises an upper housing and a lower housing, wherein an upper iron core is mounted in the upper housing; a guide groove is fromed in the upper housing; a telescopic device for driving the upper housing to move up and down is mounted in the guide groove; a main board and a lower iron core with an induction coil are mounted in the lower housing; a power device is mounted on the outer surface of the lower housing; the power device is electrically connected with the main board; a slot is formed in the lower housing; the guide groove of the upper housing is movably inserted into the slot; and the induction coil of the lower iron core is electrically connected with the main board. The fault indicator for the distribution line is good in suitability and good in indication effect, can timely and accurately provide fault point information, can stably run in a severer environment, and is stable and reliable in performance.