For the frequency jittering radar,the problems of range migration and phase jittering among different pulses may occur during the long-time integration,which will affect the target energy integration.Therefore,a new coherent integration algorithm,namely,Frequency jittering based Radon-Fourier transform(FJ-RFT),is proposed.Based on jointly searching in the motion parameter space,the problems mentioned above can be simultaneously resolved and the coherent integration can be then realized.The Cramer-Rao lower bound(CRLB) and the Blind speed sidelobes(BSSL) of the proposed FJ-RFT are analyzed in detail.Finally,numerical experiments are provided to demonstrate the effectiveness of the proposed method. For the frequency jittering radar, the problems of range migration and phase jittering among different pulses may occur during the long-time integration, which will affect the target energy integration. Before, a new coherent integration algorithm, namely, Frequency jittering based Radon-Fourier transform (FJ-RFT), is proposed. Based on jointly searching in the motion parameter space, the problems mentioned above can be simultaneously resolved and the coherent integration can be then The. The Cramer-Rao lower bound (CRLB) and the Blind speed sidelobes (BSSL) of the proposed FJ-RFT are analyzed in detail. Finally, numerical experiments are provided to demonstrate the effectiveness of the proposed method.