The calibration method is an indispensable key element in the study of three-dimensional measurement systems of line-structured light. We focus on three issues in the calibration method of line-structured light sensors,the calibration target, calibration method of light plane, and evaluation of calibration accuracy. At first, the commonly used calibration target type and its calibration characteristics are summarized, which provide a reference for the selection of calibration target. Then, the current main calibration methods of light plane are divided into three kinds according to the relative motion relation between the calibration target and the sensor, namely the calibration method with fixed position between calibration target and the sensor, the calibration method with controllable relative motion between the calibration target and the sensor, and the calibration method with freely motion between calibration target and the sensor. Subsequently, we systematically summarize the existing evaluation methods of the calibration accuracy, and analyze the principles and characteristics of them. Finally, we summarize the development status of the line-structured light calibration method, and point out that the line-structured light self-scanning measurement system and the underwater calibration are the development trend of line-structured light sensor.