The invention discloses a buffer material for a hot press. The buffer material comprises a base layer, a fixing line and first fibers consisting of a single component substantially. The buffer material has reversible deformation capacity under the operating conditions of the hot press. The first fibers are fixed on the base layer in a knitting mode by means of the fixing line, and nonwoven cloth with the density of about 0.1-3.0 grams per cubic centimeter is formed; the base layer and the fixing line respectively independently consist of one or more kinds of fibers of which the glass transition temperature is more than or equal to that of the first fibers; and the first fibers account for more than or equal to 70 weight percent of the buffer material. The invention also provides application of the buffer material for the hot press.