Based on the analysis on gasoline engine in traditional ignition mode,this paper puts forward a new ignition mode,reveals a new ignition device and control circuit.The device can continuously provides high-voltage impulse to spark plug,and continuous spark occurs at the gap of spark plug.That is,the device realizes the continuous ignition.This ignition mode not only enhances ignition reliability,but also improves the spread mode of flame.It effectively improves and enhances the comprehensive performance of gasoline engine.