Left bundle branch pacing engages in the electrical activation through left bundle branch area and produces ventricular electrical synchronization. This pacing has been considered as an attractive mode to achieve normal physiological pace markers. For patients with the site of block in infra-Hisian or distal His bundle，left bundle branch pacing can bypass the block region. As a new technology，left bundle branch pacing is still in the stage of clinical exploration. The definition，criteria，efficacy and safety of left bundle branch pacing need further investigation and validation in large randomized clinical trials.