The invention provides a polarization plate sheet warping correcting method. According to the method, a polarization plate sheet is placed in a cylinder, then, the polarization plate sheet and the cylinder are placed in the conditions with the proper environment temperature and temperature, correction is conducted for a certain time, and accordingly a warped NG product is corrected into a qualified product again. The polarization plate sheet warping correcting method overcomes the restraints of site and equipment requirement conditions in the existing technology; the advantage in the cost aspect is obvious, targeted correction is conducted on the warped NG finished product, and cost waste is reduced; and a correcting tool is simple in structure, the environment required precision is not high, and batched correction can be achieved.