By studying the existing methods for countering frequency-shift jamming

this paper comes to the conclusion that the applicability of jamming discrimination method based on echo matching output center-frequency is limited and slope varying LFM (SV-LFM)

a radar transmitting waveform

can suppress the jamming to some extent

if the agile way is designed reasonable. Meanwhile

a jamming discrimination method jointing coherent integration and two dimensional fractional Fourier transform (2D-FRFT) is proposed on the background of LFM pulse Doppler radar countering self-screening frequency-shift jamming. According to the peak value difference of echo signal under the two processing modes

true and false targets are identified by comparing with a setting threshold. Simulation results show that the conclusion is correct and the proposed method works effectively.