The invention relates to a printing processing method. The printing processing method comprises the following steps that ink is arranged on a light-transmitting base material in a full plate printing manner to form an ink layer; a printing layer is formed through silk printing, and the ink layer is located between the light-transmitting base material and the printing layer; an infrared picosecond laser device is utilized for rough scanning to remove ink in a preset area; and the infrared picosecond laser device is utilized for fine scanning to remove ink left in the preset area. The ink is removed through lasers in the preset area so as to be used for backlight transmission, the infrared picosecond laser device weak in energy is utilized for processing, and the light-transmitting base material is prevented from being destroyed by the too strong lasers. The ink removing step comprises rough scanning and fine scanning, most ink of the preset area can be fast removed through rough scanning, and the processing efficiency can be guaranteed easily. After rough scanning, further laser processing is quite close to the light-transmitting base material, and fine scanning is adopted to be beneficial to protecting the light-transmitting base material; and the ink is removed thoroughly, and the light-transmitting effect is good.