The invention provides a residual-current circuit breaker with a residual-current fault indication function. The residual-current circuit breaker includes a pedestal and a housing, wherein two sides of the pedestal are provided with an L-level contact support and an N-level contact support; a self-locking display mechanism is in transmission connection with an electrical apparatus release; a transmission piece is also arranged on the L-level contact support; and transmission of the transmission piece drives the L-level contact support to rotate to enable the electrical apparatus release to realize release of the L-level contact support. The residual-current circuit breaker with a residual-current fault indication function has the advantages of being simple in the residual-current protection release structure, being high in synchronism and being simple and effective in the transmission structure.