A method for modeling a reflection attribute of a real object material based on a linear light source comprises the following steps: (1) a data collection device based on the linear light source collects and process data; the linear light source is taken as a light source system of the data collection device; the linear light emitted by the linear light source shines a collected plane object, a control system drives an automatic translation system to move forwards; meanwhile, an industrial camera collects images of the collected plane object, a computer performs subsequent processing of the collected image data to obtain a trajectory curve of pixel values and store the trajectory curve; (2) a reflection table is generated; (3) BRDF attribute is modeled to obtain rhod of a Ward illumination model, and then obtain alpha, and finally obtain rhos according to the trajectory curve of the pixel values obtained in the step (1) and the reflection generated in the step (2), wherein, the rhod is a diffuse reflection parameter, the rhos is a mirror reflection parameter and the alpha is a material roughness coefficient. The method can efficiently collect data and quickly solve the parameters of the BRDF model, and is easy to be realized.