a method of making a polypropylene printing plate using a paper matrix in which a roll and an opposing member are prepared , a paper matrix is attached to one of the roll and opposing member , a crystalline ethylene - propylene copolymer having a mfi of 3 ˜ 10 , containing ethylene less than 20 % by weight and tensile yield strength of 220 ˜ 330 kg / cm 2 is continuously fed under molten state between the roll and the opposing member , and then the crystalline ethylene - propylene copolymer is pressed and cooled to be hardened . further , a reproducing printing plates consists of a crystalline ethylene - propylene copolymer whose melt flow index is selected in a range of 3 ˜ 10 , which contains ethylene less than 20 weight % and which has the tensile yield strength of 220 ˜ 330 kg / cm 2 .