The invention provides a status monitoring method for a spark gap trigger circuit, which includes the steps: monitoring normality of a path of signal transmitted by a control protector; detecting the status of a trigger instruction output end of a programmable device logic circuit or the status of a trigger output end of a spark gap trigger device; subjecting the detected status signals to digital filtering; broadening narrow-pulse status signals obtained by filtering; and allowing a programmable device to transmit collected status marking signals to the control protector. By the method, the status of the gap trigger circuit can be determined timely and accurately; transient trigger pulse is detected at the trigger output end of the spark gap trigger device; transient status information is reliably transmitted to the control protector in milliseconds; and accordingly the problem of locating failure of the spark gap trigger circuit is well solved, and field debugging and maintenance of the spark gap circuit are facilitated greatly.