The invention relates to a high voltage direct current breaker parallel-connection capacitor's unbalance current monitoring device and the method of the same. The device comprises at least one wireless current sensing and wave recording device which is connected with a data acquisition unit in a wireless manner so that the acquired instantaneous current data waveform of a measurement point is transmitted to the data acquisition unit in a wireless manner. The data acquisition unit is connected to a calculation and analysis platform either in a wireless manner or a wired manner so that the instantaneous current data waveform is analyzed and processed by the calculation and analysis platform and a prompt is given when an abnormality is found. With the device and method of the invention, it is possible to determine whether the unbalance current difference across each of the parallel-connection capacitors is close to the abnormal range or not through the acquisition and analysis on the current parameters of each branch capacitor so as to find capacitors whose operating conditions are abnormal as early as possible, to repair and replace them instantly and to effectively raise the operation reliability of a high voltage direct current transmission device.