A built-in intelligent circuit breaker with an automatic closing function, including a box body and a bearing plate. Inside the box body is provided a circuit breaker actuating mechanism, a wire inlet end, and a wire outlet end. The circuit breaker actuating mechanism is triggered by a poke rod positioned in the box body. The bearing plate is positioned in the box body and combined with an electrical operating mechanism. The electrical operating mechanism is provided with an execution end, and the execution end is connected with the poke rod, such that the circuit breaker actuating mechanism is triggered by the poke rod to realize the on/off of the circuit breaker during the operation of the electrical operating mechanism under the control of an automatic closing control unit.