The invention discloses a preparation method for quickly freezing and conditioning fried purple sweet potato chips and relates to the technical field of food processing. The preparation method comprises the following preparation steps of weighing purple sweet potato whole flour, pea starch, powdered sugar, butter and water; adding warm water into a stainless steel basin, and then adding the powdered sugar, the butter and the starch; uniformly dissolving and then adding the whole four; kneading mixed powder into flour doughs; rolling into pieces by using a rolling pin, cutting into a strip shape by using a knife, and putting on a tray; in addition, neatly arranging, covering with a preservative film, putting the arranged potato sweet potato chips in a refrigerator with the temperature of 40DEG C below zero and 16DEG C below zero, and freezing for 1 to 18 hours; directly frying the frozen sample at the frying temperature of 170 to 190DEG C for 1 to 3 minutes; lifting a frying basket, and shaking for multiple times; after surface oil is quickly dried, clipping out and putting in the stainless steel tray, and restoring to room temperature for setting. According to the preparation method disclosed by the invention, the operation is simple; preparation conditions are easy to control; a finished product is easy to store; unique flavor and nutrition of the purple sweet potatoes are maintained, the eating of people is facilitated, and processing ways of the purple sweet potatoes are enriched.