Edge detection is an important step in laser image processing. In order to obtain complete laser image edges , a laser image edge detection method based on strong noise is designed for the defects such as large error in laser image edge detection and easy to be disturbed by noise. First , the laser image is collected , and the histogram equaliza- tion technology is used to enhance the original laser image to improve the quality of the laser image. Then , wavelet transform is used to remove the noise of the laser image , and the Canny operator is used to detect the edge of the laser image. Finally , the test results show that compared with the current laser image edge detection method , this method can detect more details of the laser image edge , The average value of laser image edge detection accuracy is more than 92% , and the laser image edge detection time is controlled within 60 ms. Laser image provides a high-precision detec- tion technology.