The invention discloses a balancing control method and system for interval multiple trains. The method includes obtaining the interval distance between a current train and a preorder train after the current train departs; and comparing the interval distance with a set distance threshold value, and adjusting the current driving speed of the current train according to compared results. Trains can bearranged to depart according to a departure timetable by controlling the set cruise speed of train departure at different intervals, so that train departure interval density values at the different intervals can be effectively controlled, and the problems of the jamming of the multiple trains queuing out of a station can be relieved; the current train can be controlled to depart according to theset cruise speed by obtaining the traffic capacity demands and departure timetables of the platform where the current train is located; and the interval distance between the current train and the preorder train can be obtained during the driving of the current train, so that the current train can be controlled to maintain the set cruise speed to drive or decelerate in real time, and therefore, thebalancing capabilities of the interval multiple trains can be enhanced, and the maximizing of traffic capacity can be realized.