As an important index of radar, the range resolution is mainly limited by bandwidth of radar system. In this paper, a new method of improving radar range resolution is proposed based on waveform characteristic identification techniques. The Results of data simulation and real test of flight show that the range resolution can be improved markedly with the proposed new method, and for the radar with 2MHz bandwidth, its range resolution can reach about 80m, which is twice as much as that using the conventional method.