The invention relates to a method for processing polyester ultra-fine fiber coral blanket comprises a DTY material selection, a warping process, a weaving process, a pre-shaping process, a cutting process, a printing process, a loosening drying process, a color fixing process, a finishing process, a thermal shaping process, a back furring finishing process, a sewing process, and final product outlet. The pre-shaping process comprises that pre-shaping the blank cloth in weaving process at high temperature before the cutting process. And the invention has the advantages that the invention can assure the contract homogeneity of blank fiber and stabilize the longitudinal verticality, to obtain better smooth, water adsorption and thermal insulation functions, and the invention can save cost, reduce SS degree of printed pollutant, and can improve the color stability of fabric.