The research on the connectivity characteristics of wireless vehicle network is of great significance to the realization of vehicle-to-vehicle (V2V) communication. However, vehicles on the road are dynamically changing, and V2V communication is greatly affected by transmission distance and road environment, it’s difficult to analyze the connectivity between vehicles. In this paper, firstly, we establish the single slope path loss model, and analyze the connectivity probability of V2V in urban intersection scenarios. Secondly, we analyze the relationship between connectivity probability and transmission distance and threshold. It is found that radio environment and transmission distance have significant effects on the probability of connectivity.