A newly designed thyristor full wave rectifier is introduced here. Differing from the traditional synchronizing and triggering mode, the rectifier adopts the opto-electric coupler as isolator and the couter-EPROM set as pulse allotter. Though both the analogue and digital mode are involved in the processing of signal transmission, the main process which included the series-phase-shifting and the parallel-triggering is formed by the digital circuit. So apart from the merits of simplicity and reliability, the outstanding advantage is the high anti-disturbance ability. It can be the first choice as laser power supply.