A processing method of a snack food of Chinese chestnut is provided. The processing method comprises the following steps: taking fresh Chinese chestnut from Qianxi, grading and screening fresh Chinese chestnut fruits, and singling out fruits with wormholes, mildewed and rotten fruits, and impurities; manually cutting surfaces of the fresh Chinese chestnut fruits, stir-baking the cut fresh Chinese chestnut fruits in a wok, removing shells and endothelia of the Chinese chestnut fruits, and impurities, singling out non-standard Chinese chestnut kernels, carrying out quality inspection, rinsing with clear water, removing the shells and the endothelia of the Chinese chestnut fruits, and impurities, and draining remained Chinese chestnut kernels; quick-freezing the drained Chinese chestnut kernels in a -38DEG C cold storage; and roasting or frying the well quick-frozen Chinese chestnut kernels to prepare the snack food of Chinese chestnut. Above quick-freezing manner adopted in the invention makes nutritional components of Chinese chestnut be effectively reserved, and the processing of Chinese chestnut to the snack food has the advantages of simple processing method, no loss of the nutritional components, delicacy, and improvement of the grade and the nutritional components of Chinese chestnut. So a new edible use of Chinese chestnut is developed.