Aimed at the linear distortion and nonlinear distortion appeared in laser galvanometer in mechanical parts in rapid prototyping，a laser galvanometer graphic correction algorithm was proposed. With using of this algorithm, on one hand, the distortion of linear laser galvanometer appeared in graphic scanning and in that of nonlinear could be eliminated, and on the other hand, comprehensive error produced in laser galvanometer scanning process could be corrected. Experiments show that the algorithm eliminates the linear and nonlinear distortion generated, and corrects the integrated error produced, which provides satisfactory correction effect for the laser galvanometer in rapid prototyping manufacturing machinery accessories.