With the increasingly serious energy crisis and environmental problems, people's demand for new energy is more urgent, so new energy products emerge in an endless stream. New energy vehicles are highly praised by most countries for their energy saving and environmental protection, and there are many kinds of new energy vehicles.This paper first introduces several common new energy vehicles in the market. Then, this paper obtains the output data of three kinds of new energy vehicles, and makes a correlation analysis by using gray correlation, and concludes that the correlation between the total output of plug-in hybrid vehicles and vehicles is strong, which is the representative of today's new energy vehicles. This paper also uses time series to predict the electric vehicles in the next two years, and obtains a reasonable prediction model. Moreover, this paper creatively puts forward the impact of technological innovation on new energy vehicles, and uses a reasonable model to predict the changes of the output and total output of fuel cell vehicles after technological innovation. Finally, this paper tests the time series and further proves the rationality of the prediction.