The invention discloses an A type intelligent breaker with an automatic switching-on function. The breaker comprises a breaker body, wherein the breaker body comprises an upper cover, a handle, a bottom case and a bearing plate, the upper cover is provided with a slot, two ends of the slot correspond to positions at which the breaker is in the on / off states, the handle extends out of the slot, the bottom case is provided with a breaker action mechanism, a line inlet end and a line outlet end, the breaker action mechanism is triggered by the handle, the bearing plate is arranged between the upper cover and the bottom case, a crank portion and a picking portion are arranged on the bearing plate, the crank portion consists of a ratchet pawl mechanism and a pushing rod, the picking portion is connected to the handle, a motor is arranged in the bottom case, the crank portion converts the rotation of the motor to the reciprocating action of the picking portion under the control of an automatic switching-on control unit, and the handle is switched between the in state and the off state.