Maneuvering trajectory high- squint SAR imaging method and device and terminal equipment

The invention is suitable for the technical field of SAR imaging, and provides a maneuvering trajectory high-squint SAR imaging method and device and terminal equipment, and the method comprises the steps: obtaining a first echo signal of an SAR under high squint based on a pre-constructed slant distance model; removing a Doppler frequency shift term and a fast time secondary coupling term in the first echo signal to obtain a second echo signal; performing range direction processing on the second echo signal according to a preset linear range migration correction function and a range time domain perturbation function to obtain a third echo signal; and performing azimuth processing on the third echo signal according to a preset azimuth time domain perturbation function, an azimuth frequency domain phase filtering function and a high-order phase compensation function to obtain a focused image of the SAR under high squint. According to the invention, the imaging quality of the SAR under high squint can be improv