Abstract: In order to eliminate the influence of glass thickness on the line structured light 3D measurement system, a new 3D measurement model was constructed. A camera refraction model was established based on Snell's law to accurately calculate the propagation path of light under the influence of glass. A new calibration method was proposed, and the experimental results showed that the camera's reprojection error was 0.23 pixel. Meanwhile, a new plane correction method was proposed, which could quickly complete all laser plane corrections through the relationship between the laser plane, refractive surface, and glass thickness. The root mean square error of the point cloud fitting plane could reach 0.32 mm, and the absolute distance error could reach 0.26 mm. The experimental results show that the proposed method has good measurement accuracy and certain practicality in the industrial field.