In order to obtain the specific location information of hanging objects in the lifting process,a 2D outline scanning system based on linear CCD was designed.The principle that laser line and linear CCD projection line must intersect was used for getting the 2D coordinates of laser irradiation.A linear CCD pulse central position measurement method based on hardware was proposed,and double line method was used for linear CCD calibration to obtain the mapping relationship between the output pixel coordinates and projection line.A speed control strategy was presented for smooth and efficient control of stepper motor.A cylindrical PVC with known size was taken as the experiment object,and was measured by the system for coordinates of some discrete points of the 2D contour.The cylinder radius was obtained by fitting circle with an average error of 0.928 mm,and one scan took about 0.45 s.The results show that the system has a high measuring accuracy,fast scanning speed,and can be widely applied to 2D contour scanning of objects.