Abstract: In order to fully understand the real-time emissions of vehicles in Beijing, the traffic dynamic emission characteristics of five typical kinds of days (working days, non-working days, heavy pollution days, festival and big-event days in 2017) were studied with a self-developed dynamic vehicle emission model coupled with the dynamic traffic flows in different times and regions on a grid of one hour and 1 km×1 km on the main road website in Beijing. The vehicular emission spatial-temporal distribution analysis showed that the vehicle emission intensities within the inner 2^nd ring road area (including the 2^nd ring road) and the area between the 2^nd ring road and 3^rd ring road (including the 3^rd road) were 0.050 and 0.043 t/(km²·d), respectively. The distribution of NO_x emission was very regular. It was mainly distributed at the southeast 6^th ring road and outside the 6^th ring road in the northeast and northwest with the traffic links, and always reached the highest emission level at 05:00 of the day. CO emissions were mainly concentrated in the urban areas within the 5^th ring road, and the emissions reached a peak within the entire inner 5^th ring road area (including the 5^th ring road) and the traffic links at 18:00. Non-working days had the highest vehicle emissions among the five typical traffic mode days in Beijing. The results showed that light-duty vehicles should be the main target of emission management within the inner 5^th ring road (including the 5^th ring road), while heavy-duty diesel vehicles should be the main target of emission management outside the 6^th ring road (including the 6^th ring road).