The main purpose of this study is to investigate the effect of polyethylene glycol (PEG) coating on the enhancement of brightness stability of newsprint paper. The results show that PEG coating can enhance the brightness stability of newsprint. The comparison among PEG with different molecular weights suggests that the coating with PEG-1000 (molecular weight: 1000) has led to the most superior bright stability. The optimal coating weight of PEG is 7.5g/m^2. Heating treatment after PEG coating can further improve the brightness stability.