In order to solve the problem of abnormal with reception and monitoring of the optical transceiver integrated module without optical input, a method of accurately selecting trans-impedance amplifier decoupling capacitors and using software calibration is proposed. First, the I2C bus waveform and receiving power noise waveform are tested in case of abnormal monitoring, and the impact of various types of trans-impedance amplifiers and different monitoring decoupling capacitor values on receiving monitoring are verified. It is confirmed that the abnormal receiving monitoring is mainly caused by two reasons: the trans-impeda-nce amplifier monitoring residual noise and monitoring capacitance decoupling. Then, select appropriate decoupling capacitor of the monitoring signal through experiments, and using the second-order equation for software calibration. The test results indicate that this method can completely solve the problem of receiving monitoring anomaly when there is no light inputting.