The triggering device of spark gap switches is developed in this paper。It adapts a circuit scheme of the full bridge inverter and voltage doubling rectifier as the core. The paper also analyzes the relationship between output voltage and doubling capacitance on the basis of the working principle of the circuit as the basis of parameter selection. And designing an ignited control circuit with copper ball trigger switch for guaranteeing the reliability and quickness of the ball gap switch breakdown. At the same time, using the Atmega16 microcomputer is control core for program to ensure high voltage ball gap switches working in a reliable state of voltage low shake. The device has Verified on the PSCAD simulation software and set up an experimental prototype. And the experimental results show that the device output voltage is in a high precision, short charging time and stable performance.