A paper mounting machine belongs to the field of paper making machinery, in particular to a paper mounting machine for pasting and pasting two sheets of paper together, which is composed of a paper feeding mechanism, a paper mounting mechanism and a paper pressing mechanism. Two wind heads are arranged on the paper feeding mechanism in parallel, a middle positioning mechanism is arranged on the paper mounting mechanism, the paper mounting mechanism is divided into two paper paths, and wing shaped spring sheets are arranged on both sides of the paper mounting mechanism,The middle positioning mechanism is composed of the middle positioning guide block and the lifting mechanism. It is simple in structure, improves production efficiency, and meets the requirements of different sizes of paper. It is a papermounting machine that has no restrictions on the size of paper and can convert single and double sheet feeding.