Direct-current offset calibration method and device

The invention discloses a DCOC (direct-current offset calibration) method. After a receiver is electrified, digital signals of offset voltage of a circuit output port in the receiver are acquired, digital control signals controlling a DCOC output stage are acquired through the digital signals, and current is outputted to a corresponding circuit of the receiver by the DCOC output stage according to the digital control signals. The invention further discloses a direct-current offset calibration device.