The solubility parameter calculation,difference of segregation softening point test and atomic force microscope scan- ning have been used to comparative research the comparability between 2 modifiers (SBS and waste rubber powder) anal 70#A base asphalt. The results show that the compatibility between rubber powder and matrix asphalt can not be evaluated accurately by single evaluation system,comprehensive evaluation of various analytical methods should be implemented. There are many differences of relative molecular weight,solubility paramete...