In order to realize the reuse of the main components of the general handeye system and the structuredlight seam tracking system, the installation of a laser, filter and protective device on the basis of the general handeye system makes it used as a seam tracking sensor. Calibration results of the original handeye system were experimentally modified to replace the calibration of the structuredlight seam tracking sensor. The influence caused by the installation of laser and filter on the original handeye calibration result is analyzed in detail. The method of data approximation is used to improve the handeye calibration accuracy of the line laser structured light seam tracking sensor. In the experiment, the handeye system is calibrated firstly to obtain the original matrix of the camera coordinate system to the tool coordinate system. The error of welding point data obtained from the original extrinsic matrix and the actual coordinate of the solder joint is analyzed to correct the handeye calibration result. Experimental results show that the average precision of the handeye calibration of the lightseam tracking sensor based on the calibration results of the general handeye system is 0.53mm, which can meet the requirements of engineering welding.