The invention relates to a load control circuit breaker with the circuit abnormal detection function, which comprises a circuit breaker body, a voltage acquisition unit, a current acquisition unit, a processing unit and an execution unit, wherein the voltage acquisition unit is used for acquiring voltage signals of phase lines on a power line in real time and converting the voltage signals into voltage sampling signals; the current acquisition unit is used for acquiring current signals of the phase lines on a power line in real time and converting the current signals into current sampling signals; the processing unit is respectively used for converting the voltage sampling signals and the current sampling signals into real-time voltage values and current values corresponding to the phase lines, respectively comparing the real-time voltage values and current values with the preset voltage threshold value and current threshold value, and outputting a control signal under the condition that the real-time voltage values and current values are higher than any of the voltage threshold value and the current threshold value all the time within the preset delay time; and the execution unit is used for leading the circuit breaker body to have circuit breaking action after the control signal is acquired.