The invention discloses a processing method of garlic crisp chips. The processing method comprises selecting high-quality garlic, cleaning and slicing the high-quality garlic, putting the garlic slices in a saturated saline solution containing sodium hydroxide, applying ultrasonic waves to the saturated saline solution through an ultrasonic generating device, blanching the garlic slices in the saline solution with the weight concentration of 1 to 2% at 80 to 90 DEG C for 3min, steaming the garlic slices in a steamer for 15min, putting the garlic slices in a screen, washing and cooling the garlic slices through a citric acid solution for 15min, putting the garlic slices in a sample disc, and carrying out catalytic infrared sterilization to obtain garlic crisp chips with the bacteria contentsatisfying the standard. Sodium hydroxide is used during the ultrasonic cleaning and peeling process so that peeling and color protection for garlic are realized simultaneously, the efficiency is high, the care effects are good and the damage of the components such as pigments in the processing of garlic slices is prevented.