In order to meet the industrial demand of the current waveform detection under the condition of noncontact, a noncontact type current waveform detection system based on hall sensor HW302 was put forward. The system used the hall sensor to collect current signal, and displayed towards the oscilloscope after the amplification of the signal processing circuit.Then the current waveform detection was achieved. To verify the correctness of the detection, different signal was applied to the inductance coil to detect the current waveform, and analyze the performance of the system. It was showed that the system detected the current waveform through the noncontact way, basically achieving the expected results.