In order to improve the real-time performance and convenience of the calibration and correction of line-scan camera,a method of online distortion calibration and correction based on laser linear array is studied and proposed.Taking a group of laser linear arrays with known relative spacing as the reference,the real-time calibration and correction of the line-scan cameara can be realized according to the change of the relative spacing,without knowing the relative position of the camera and the imaging object,and without other equipment.This method is suitable for the case of constant object distance in the imaging process.Experiments show that the root mean square deviation of the corrected image points is 0.5685 pixel when the number of laser lines is 41 and the object distance is 0.25 m.