Synchrony is an important characteristic that commonly exists in social interactions, and interpersonal synchronization has made significant contributions to individual development, group cooperation, and social progress due to its unique value. From the perspectives of different social mechanisms, psychological processes, and neural mechanisms involved in interpersonal synchronization, a novel cyclic interpersonal synchronization comprehensive model can be constructed to reveal the potential cognitive and neural mechanisms underlying this phenomenon. Studies on interpersonal synchronization using hyperscanning techniques primarily focus on five areas: joint action, joint attention, interactive decision-making, emotional communication, and creative problem-solving. The signal changes associated with interpersonal synchronization are mainly concentrated in the right temporal lobe and left inferior frontal gyrus, with noticeable variations in theta, alpha, and mu waves within certain frequency bands. Future research should further explore the role and impact of signals in brain regions such as the right temporal lobe, frontal lobe, and left inferior frontal gyrus on the neural mechanisms underlying interpersonal synchronization.