The present invention relates to a PTZ correction method, belonging to the technical field of PTZ calibration. Firstly, the image of a preset position is collected as a template image, and an azimuth, a pitch angle and a camera zoom ratio at that time are recorded; then the template image is subjected to modeling, and the outline of a target object is extracted with the center point of the template image as a center; then a PTZ and a camera are set to carry out image collection with the preset position of the template image in collection, the collected image and the template image are compared, and the offset pixel of the target object is calculated; and finally the PTZ offset angle is calculated according to the obtained offset pixel, and the PTZ offset angle is added to the PTZ preset position, and a corrected absolute angle is obtained. The machine vision technology is used to identify a target point, the PTZ posture can be quickly adjusted, an external sensor is not needed, the alignment precision of the PTZ is improved, and the target deviation error in shooting the image is reduced.