Digital diagnosis monitoring circuit used for optical module

The utility model discloses a digital diagnosis monitoring circuit used for an optical module. The digital diagnosis monitoring circuit comprises a reception optical assembly, a digital diagnosis chip and a laser driver, wherein an input pin of the digital diagnosis chip is connected with an output terminal of the reception optical assembly, and an output terminal of the digital diagnosis chip is connected with an input terminal of the laser driver. The digital diagnosis chip comprises a microprocessor, a current mode selection circuit, a current debugging selection circuit, a digital-to-analog converter and a user read-write access interface, wherein an input pin of the digital diagnosis chip is connected with a signal input interface of the microprocessor through the current mode selection circuit, and a signal output interface of the microprocessor is connected with an input terminal of the laser driver successively through the current debugging selection circuit and the digital-to-analog converter; the mi