Aiming at the technical defects of large transfer error of traditional low-voltage current transformer with DC component load, the misalignment mechanism of the DC component causes the traditional current transformer was analyzed. A low-voltage current transformer of anti half wave DC was developed ,and proposed a detection method for anti DC performance of current transformer. Based on the method ,an anti-DC performance verification device of current transformer was developed .The experiment proved that the developed anti DC component current transformer with good performance and can satisfy the field operation requirements.