The control scheme of all-digital laser gyro is presented,and the laser gyro of the full digital control,digital ring laser gyro,is implemented. The principle and structure between the analog laser gyro and digital laser gyro are compared,and the advantages and key technologies of digital gyro are described in detail. In particular,jitter-driven pulse-width modulation waveform and graphical test data of the digital gyro is given. It is proved that the digital gyro direction of development in line with the ring laser gyro,improves debugging and production efficiency,and simplifies the requirements for navigation systems.