The invention discloses an emergency driving control device and method for a power concentration motor train unit. Under normal conditions, data are transmitted between a control train (1) and a power train (6) through a main communication line (5); a driver controller (12) in the control train (1) emits signals to a control train signal collecting unit (3); then the signals are sent to a power train central controller (8) through the main communication line (5); the power train central controller (8) is used for sending control instructions to the power train (6); and when the main communication line (5) is disconnected, an emergency driving mode is started, an auxiliary communication line (11) is used for conducting data transmission, and emergency driving control train control signals comprise forwarding signals, retreating signals, dragging signals and braking signals. According to the device and method, operation stopping of the power concentration motor train unit due to control signal communication problems can be effectively reduced, and the operation reliability of the power concentration motor train unit is improved.