The invention discloses PU (Poly Urethane) double-layer 
crystal mirror leather and a laminating method thereof. The laminating method comprises the following steps: step 1, 
coating a wet-process PU layer above base cloth; step 2, 
coating the wet-process PU layer with the dry-process PU grain layer; 3, 
overprinting a printing layer on the dry-process PU grain layer to obtain a first-stage semi-finished product; 4, 
coating the mirror release paper with transparent 
polyurethane elastomer slurry, 
drying to form a transparent 
polyurethane elastomer, coating the transparent 
polyurethane elastomer with polyurethane 
slurry, and 
drying the polyurethane 
slurry to be half-dry to serve as an adhesion layer to obtain a second-stage semi-finished product; 5, injecting an auxiliary agent on the printing layer of the first-stage semi-finished product, and then attaching the adhesion layer of the second-stage semi-finished product; and 6, the bubble row is squeezed out of the outer surface obtained after the first-stage semi-finished product and the second-stage semi-finished product are compounded, then the PU double-layer 
crystal mirror surface leather is manufactured through attaching, 
drying and cooling in sequence, and the PU double-layer 
crystal mirror surface leather has the advantages of being high in crystal feeling, good in permeability and the like mainly through the design of all the steps.