The　property　of　asphalt　mastics　consisting　of　asphalt　binder　and　mineral　fillers　significantly　affects　the　performance　of　asphalt　mixture　and　also　results　in　several　forms　of　distresses　in　pavements.　In　addition　to　the　materials　properties,　the　interfacial　interaction　between　asphalt　binder　and　mineral　fillers　has　a　significant　impact　on　the　performance　of　asphalt　mastics.　This　research　aims　to　study　the　influence　factors　of　interaction　between　asphalt　binder　and　mineral　fillers,　and　explore　its　relationship　to　viscoelasticity　of　asphalt　mastics.　Two　kinds　of　asphalt　binders,　four　kinds　of　mineral　fillers　and　five　filler/asphalt　ratios　were　selected　to　prepare　forty　asphalt　mastic　samples.　The　interaction　degree　between　asphalt　binder　and　mineral　fillers　was　characterised　by　a　new　introduced　parameter　C.　The　influence　factors　including　the　properties　of　asphalt　and　fillers　were　analysed.　The　correlations　between　interaction　and　mastics’　rheological　properties　at　different　temperatures　were　statistically　investigated.　Results　show　that　increasing　the　polar　components　ratio　of　asphalt　binder,　raising　the　specific　surface　area　of　fillers,　making　the　size　composition　of　fillers　finer　or　increasing　temperature　all　can　increase　the　interaction　degree　between　asphalt　binder　and　mineral　fillers.　Linear　relationship　was　considered　to　be　an　optimum　type　to　represent　the　correlation　between　interaction　degree　and　viscoelastic　properties　of　asphalt　mastic　at　temperatures　between　15°C　and　65°C.　There　was　a　very　significant　correlation　between　dynamic　shear　modulus/rutting　factor/fatigue　factor　and　C　value　when　the　temperature　was　between　25°C　and　45°C.　This　kind　of　correlation　weakened　at　15°C　and　55°C,　but　still　significant.　The　phase　angle　of　asphalt　mastic　has　a　significant　correlation　with　interaction　parameter　C　value　only　at　25°C　and　35°C.　©　2019,　©　2019　Informa　UK　Limited,　trading　as　Taylor　&　Francis　Group.