In order to improve the measurement accuracy of photo-electric tracing equipment, the calibration method of several parameters of the photo-electric tracing equipment is studied by using integrated photo-electric target in the field. The calibration involves TV, IR and Laser ranging. Pixel analysis is used so that multiple indica. tors of photo-electric tracing equipment can be calibrated and corrected more accurately. The correction results of some parameters are given out. The optical axis parallelism is better than 0.2 mrad. The field calibration is close to the real. Therefore, it has a higher degree of confidence than indoor.