In order to investigate the impact of driving behavior on real driving emissions (RDE) of heavy-duty diesel vehicles, a total of 9 times of smooth driving, normal driving and rough driving were carried out on three vehicles using the portable emissions measurement system (PMES). The dynamic parameters v·a_pos[95] and emission factors of the urban, rural, motorway section and total travel distance of each vehicle were calculated before and after the three tests, and the dynamic parameters v·a_pos[95] were used to analyze the effects of pollutant emission characteristics. The results show that compared with smooth driving, the NO_x emission factors of the three vehicles under normal driving and rough driving behavior increase by 33.73%-621.10% and the PN emission factors increase by 21.26%-122.40%. At the same time, the correlation between CO emission factors and the dynamic parameters v·a_pos[95] is not obvious, but the NO_x emission factors and PN emission factors of suburbs and high-speed sections have a strong correlation with the dynamics parameters v·a_pos[95]. It can be seen that the impact of driving styles on vehicle emissions cannot be ignored.