Time and frequency synchronization is the key technique of airborne bistatic synthetic aperture radar, and in one system time contact with frequency, which not only affect modulate and demodulate frequency but also determine the stability of system time. Many analysis just only from time or frequency ago, in this paper we analysis the impact of time and frequency errors in airborne bistatic synthetic aperture radar's imaging unitedly and give the results of simulation. These offer the theoretical basis for time and frequency synchronization system design.