Abstract: A safety clamp system for an emergency start of a vehicle battery comprises a boost circuit, a voltage-stabilizing circuit, a control unit, a power detection circuit, a battery-clamp-loose detection circuit, an alarm circuit, an auto-detect-battery-voltage-and-short-circuit detection circuit, a driving circuit and a turn-on/off detection circuit. The power detection circuit and the auto-detect-battery-voltage-and-short-circuit detection circuit detect whether an input voltage or the vehicle battery is normal or abnormal. If normal, the control unit controls the driving circuit to drive the turn-on/off detection circuit, so that a power supplied by an external lithium battery is sent to the vehicle battery. If abnormal, abnormal detection signals are sent to the control unit to drive the alarm circuit. If a battery clamp is loose, the control unit controls the driving circuit to stop driving the turn-on/off detection circuit, so that the power is not sent to the vehicle battery.