Abstract: In order to ensure the reliability of the wind deflection angle identification results of suspension insulators on transmission lines in harsh environments, a wind deflection angle identification method of suspension insulators on transmission lines based on continuous wave SAR imaging model is proposed.Based on the continuous wave SAR imaging model, the pulse signal is continuously transmitted, and the pixel coordinates of the two ends of the insulator string in the insulator target area are located through the identification method of the wind deflection angle of the insulator based on the position calibration, and the insulator SAR image is generated. The continuous wave SAR imaging processing method based on the improved frequency scaling algorithm is used to alleviate the defocus phenomenon of the insulator SAR image, and the SAR image is segmented. Acquire the insulator target area in the generated insulator SAR image, and identify the wind deflection angle of insulator string based on the standard of “two points determine a straight line”. Experimental results show that the proposed method highly matches the wind deflection information of the actual wind deflection angle with the identification results of the wind deflection angle of the insulator in a harsh environment.