Abstract:When using intense weathering soft rock to fill high grade highway embankment,compaction characters and wetting deformation characters are the major indices to estimate the filling performance. The CBR experiments under different compaction degrees showed that the CBR value increased with the filling compaction degree increase. Triaxial shear apparatus was used to conduct dry-wet double-line parallel experiment and wetting deformation experiment of different compactions under complicated stress conditions. The result shows when the compaction degree reaches to 90% with rather high deviatoric stress,wetting can not only generate high additional axial deformation,but also cause high additional volumetric strain and deviatoric deformation. Increasing compaction degree of the filling is the key factor to decrease wetting deformation.