Abstract: This paper demonstrates a high accurate controller of laser pulse position in time coordinate which bases on a 8098 programmable controller.This controller can output accurate and turnable trigger signals to lamps and Q-switchers to control the output of laser pulse by use of powerful ability of output/input and interruption of the 8098 programmable controller.By use of this controller the PPM modulation of the output of the laser pulse can be realized.This controller can control two laser to run synchronismly to obtain high peak power or to run alternately to obtain high repetition rate.