In this study， a double laser triangulation system was established to improve the transmission efficiency of the amorphous strip. The double laser triangulation system can detect the spatial position of the high reflection strip during transmission. Therefore， some key technologies were studied， such as laser beam shrinking， image acquisition and processing， centroid positioning， and system calibration. First， the principle of measuring the strong reflection strip’s spatial position with a double laser was introduced， followed by the design of the detection system. A beam constrictor was added to the transmission optical path to improve the positioning accuracy of laser spot centroid extraction. Second， the detection system’s calibration experiment was completed by setting up the experimental detection device for the spatial position of strip transmission. Furthermore， the calibration curve of the spatial position of the strip transmission was obtained. The fitting method of the corresponding curve between the spot centroid and the actual position of the strip based on the least square polynomial was proposed. Finally， the transmission position of the amorphous strip was detected by the high-speed camera and the CMOS camera simultaneously. The measurement accuracy of the CMOS camera was verified by taking the measurement results of the high-speed camera as the reference value. The results show that the relative deviation between the detection result of the CMOS camera and the reference value is less than 0.05%， conforming to the system position detection accuracy of 50% μm. The proposed system can be used for high precision measurement of spatial position in the transmission process of the strip with a high reflector.