As the existing Zhang Zhengyou general dot calibration algorithm has a large amount of calculation and the unstable results in the current visual cutting industry with laser cutting machine,a self-calibration algorithm based on nine-dotted camera is proposed.The homography matrix between the image and the template defined on the X-Y plane of the world coordinate system is calculated.The homography matrix is used to linearly solve the internal parameters of the camera,and then the distortion coefficient is solved considering the nonlinear distortion factor.Finally,eight affine projection matrices are obtained in the corrected template,and the mean value is taken as the final projection matrix to solve the world coordinates.The experimental results show that the algorithm is faster and more stable than the existing dot-based camera self-calibration algorithm.