A composite switching circuit for flexible electroluminescent (EL) device driver was designed. The EL devices behave as capacitive loads, resulting in the transistors’ breaking down by the high peak current of the transistors at the instant as they are turned on and thus low reliability of the drivers. The thyristors (SCRs) with higher transient current capacity were employed as the main switching devices for the driver, in parallel connection to the MOSFETs. The MOSFETs play the roles of current shunt and short-circuiting, thereby turn off the thyristors after being turned on. The MOSFETs can stay off the peak current and the two kinds of transistor, both the thyristors and MOSFETs, could have the same or nearly the same temperature rise by properly adjusting the delay time of the MOSFETs, further improve the reliability of this composite thyristor-MOSFET switching circuit.