As a main countermeasure mode for the UAV remote control link, the full time, broadband, suppressive electromagnetic jamming may waste jamming energy and have impact on the environment. Follower jamming and the turn-on strategy generated based on its jamming range can solve the problem effectively. In this paper, the follower jamming hyperbolic and the limited power jamming range inequation are conducted based on the time domain and power conditions of the follower jamming to the UAV remote control link. Accordingly, the effective jamming ranges under different parameters are confirmed and a reasonable jamming turn-on strategy is put forward. The simulation results show that the strategy can meet the changes of the parameters well, which is of great significance for improving the effectiveness of electromagnetic jamming.