The invention belongs to the technical field of processing of an ultrathin flexible plate, in particular relates to a processing technology optimization method of the ultrathin flexible plate. The invention discloses the processing technology optimization method of the ultrathin flexible plate, and a processing technology of the ultrathin flexible plate comprises the following steps of: A, cutting; B, laser drilling; C, hole blacking; D, a protective copper foil tearing; E, copper plating; and F, circuit fabricating. By the processing technology optimization method, the processing technology of the ultrathin flexible is optimized; by optimizing the processing technology, the problem of product folding and deformation is solved, the yield of circuit fabrication is greatly improved, and finally, the quality and the yield of the product are enhanced.