In the application process of laser technology, the detection and determination of spot position is a key link, which directly determines the application performance of laser technology. However, due to the limitations of application methods, existing spot position detection methods have problems such as long detection time and low detection accuracy. Therefore, a research on laser spot position detection based on digital image processing technology is proposed. Using image acquisition devices (cameras or cameras) to obtain laser spot images, processing the laser spot images based on digital image processing technology. Based on this, the two-dimensional Otsu algorithm is used to segment the laser spot images. The Canny operator is applied to extract the edge of the spot, and the minimum twice circle fitting method is used to fit and process the edge of the spot. The center position of the laser spot can be calculated, thus achieving accurate detection of the laser spot position. The experimental results show that the minimum detection time for spot position obtained by the proposed method is 0.1 s, and the minimum detection error for spot position is 0.2%, fully confirming that the proposed method has better application performance.