A circuit breaker fault tripping indication device comprises a tripping buckle (1). The device is characterized in that the tripping buckle (1) is provided with a tripping buckle boss (101), and in the rotation process of the tripping buckle (1), the tripping buckle boss (101) can respectively contact a front boss (201) and a rear boss (202) of an indicator (2) to push the indicator (2) to move back and forth along the horizontal direction. A function of fault indication is added to miniature circuit breakers. When a circuit breaker is switched from a closed state to an open state in the use process under the action of the tripping buckle on the indicator, whether the tripping is fault tripping can be judged according to the position of the indicator in an observation window. After the fault is removed, as long as the circuit breaker is closed again, the indicator will be automatically switched from an alarm state to an initial state. The whole mechanism can be realized through simple improvement on the existing circuit breaker. The structure is simple. The efficiency of circuit breaker maintenance is improved.