A distributed printing method of a powder-bed type 3D printer is present. The method first generates, for each printing layer of a 3D model file, a color image which is applied to print an outer contour part and a non-color image which is applied to print an internal structure part. The method then calculates replacing information according to a default adjusting module, and adjusts color information of the color image and adhesive information of the non-color image based on the replacing information. Finally, the method combines the adjusted color image and non-color image for generating a final printing image, and executes printing according to the final printing image.