Method for operating a hybrid drive train of a motor vehicle , the hybrid drive train having a first drive unit , a second drive unit and a double clutch transmission , the double clutch transmission having a first power transmission path with a first friction clutch and a first component transmission , and a second power transmission path with a second friction clutch and a second component transmission , the first drive unit being coupled to an input member of the first friction clutch and to an input member of the second friction clutch , and the second drive unit being coupled to an output member of the second friction clutch , the method serving to provide tractive power for accelerating the motor vehicle , and characterized by the following steps: - providing of first drive power by way of the first drive unit , and transmitting of the first drive power via the first friction clutch and the first component transmission towards an output of the hybrid drive train , a first combustion gear stage being shifted in the first component transmission , and simultaneous providing of second drive power by way of the second drive unit via the second component transmission towards the output , the second friction clutch being open, and a first electric gear stage being shifted in the second component transmission , which first electric gear stage is lower than the first combustion gear stage , - determining whether a gear change is required in the second component transmission from the first electric gear stage into a second higher electric gear stage , and, if yes, a) shifting of the first component transmission from the first combustion gear stage into a second combustion gear stage which is higher than the first combustion gear stage , b) shifting of the second component transmission into neutral, and transmitting of drive power of the second drive unit via the second friction clutch and the first friction clutch and via the first component transmission to the output , and c) shifting of the second component transmission into the second electric gear stage . - providing of first drive power by way of the first drive unit , and transmitting of the first drive power via the first friction clutch and the first component transmission towards an output of the hybrid drive train , a first combustion gear stage being shifted in the first component transmission , and simultaneous providing of second drive power by way of the second drive unit via the second component transmission towards the output , the second friction clutch being open, and a first electric gear stage being shifted in the second component transmission , which first electric gear stage is lower than the first combustion gear stage , - determining whether a gear change is required in the second component transmission from the first electric gear stage into a second higher electric gear stage , and, if yes, a) shifting of the first component transmission from the first combustion gear stage into a second combustion gear stage which is higher than the first combustion gear stage , b) shifting of the second component transmission into neutral, and transmitting of drive power of the second drive unit via the second friction clutch and the first friction clutch and via the first component transmission to the output , and c) shifting of the second component transmission into the second electric gear stage . a) shifting of the first component transmission from the first combustion gear stage into a second combustion gear stage which is higher than the first combustion gear stage , b) shifting of the second component transmission into neutral, and transmitting of drive power of the second drive unit via the second friction clutch and the first friction clutch and via the first component transmission to the output , and c) shifting of the second component transmission into the second electric gear stage . <EOS>