To provide better understanding of the adhesion interface along the bonding line of Chinese fir glulam,the authors investigated the surface wettability of tangential section,radial section,heartwood, sapwood and different surface roughness. The results showed that the wettability of a radial section was better than that on a tangential section,the wettability of sapwood surface was better than that on heartwood surface,and the wettability of samples improved with increasing the surface roughness.