Paper feeding system of air permeability detector

The paper feeding system comprises a base, a cover plate, a paper guiding assembly and a pressing and rolling assembly, a paper feeding end paper guiding assembly and a paper discharging end paper guiding assembly are arranged at the left end and the right end in the base respectively, the paper feeding end paper guiding assembly comprises a guide rail, a fixing block, a sliding block and a stand column, the cover plate is of a detachable structure and is arranged on the base, and the pressing and rolling assembly is arranged on the base. The paper feeding end paper guiding assembly and the paper discharging end paper guiding assembly are arranged on the base, after the distance between the fixing block and the sliding block stand column is adjusted according to the width of tipping paper to be tested, the telescopic end of the air cylinder in the sliding block abuts against the front face of the base and limits the front face of the base, and the paper feeding end paper guiding assembly and the paper dischar