Since 2009，the scale of China's auto market has ranked the first in the world for nine consecutive years.The market growth has gradually changed from increment to stock，and entered a low-speed growth zone.Under the background of exit of the preferential policy of car purchase tax in 2018，China's PV market in 2018 presents new characteristics with the continuous promotion of policy of encouraging domestic demand，stricter environmental protection and the impact of consumption upgrading.Through a detailed analysis of the distinct characteristics of China's PV segmentation market in 2018，a thorough insight into the macro-economy，market and consumption environment，and the use of big data to analyze the development of the car parc，used car market，and replacement market，the impact on the new car market is calculated from multiple dimensions.Finally，the trend of PV market in 2018 and 2019 is forecasted.