The invention discloses a state indicator with a gap line surge arrester, relating to the lightning-proof protection device. The invention has a structure which is as follows: an energy taking part (1) is connected in series on an earth wire of the arrester, a low-current counting circuit (2) and a high-current counting circuit (3) as well as an alarm indicating circuit (4) are respectively connected with corresponding terminals of the energy taking part (1) to obtain energy; the high-current counting circuit (3) is connected with the alarm indicating circuit (4) and provides a switch controlsignal for the alarm indicating circuit (4); the alarm indicating circuit (4) is connected with an alarm indicating mechanism (5) and controls the alarm indicating mechanism (5) to operate; a clear mechanism (6) of a counter is connected with the high-current counting circuit (3) to realize the zero clearing. The state indicator is an inactive component and has practicability and economical efficiency as well as long service life and strong visibility, and is suitable for the on-line monitoring of the MOX arrester with a gap line with a voltage of 35 or more than 35 kV.