The invention relates to a processing technique for full polyester superfine fiber coral fleece fabric, and belongs to the technical field of polyester fiber product processing. The processing technique comprises the following steps in turn: selecting polyester DTY silk, warping, fabric manufacturing, preposing setting, width opening, pre-napping, pre-setting, dyeing or printing, loose baking, fixation, finishing, heat setting, back-fleece finishing and return setting, wherein the preposing setting is to perform steam setting on grey cloth obtained in the fabric manufacturing step before the width opening step, and control the temperature and time of the steam setting; and the pre-napping is to perform back napping on the grey cloth after the width opening before the pre-setting step, andcontrol the hair side height. The processing technique has the advantages that the full polyester superfine fiber coral fleece fabric reflects ideal warm keeping and soft effects; the single fiber direction of the front hair face has good consistency, the height is uniform, and the hair straight effect is good; the cylindrical surface of single-stranded fiber of the front hair has uniform thickness and no flowering phenomenon, and the front hair face does not have small pits; and the processing technique avoids back hair bonding and reduces impure hairs and float hairs.