As a high-precision measurement method, Airborne Gravity Gradient Measurement (AGGM) is easily affected by any error source. In this paper, the influence of flight speed on AGGM is studied. Firstly, the relationship between flight speed and gravity gradient signal is derived from the dynamic formula. Secondly, the impact of flight speed on AGGM is simulated based on the actual flight data of the aircraft. The results show that when the flight speed of the aircraft is 60m/s in the east-west direction and 50m/s in the north-south direction, the impact of velocity on $\Gamma_{xy}$ component is 3E, and on $\Gamma_{x x}-\Gamma_{yy}$ component is 0.5E. Finally, we find that when the flight speed meets a certain relationship, the flight speed has no effect on AGGM. In short, our study not only makes a significant contribution to reduce the influence of flight speed on the AGGM, but also offers some useful suggestions on how to design the survey line.