In　this　paper,　the　temporal　space　charge　dynamics　under　both　temperature　and　voltage　polarity　reversal　of　an　epoxy　resin　impregnated　crepe　paper　are　characterized　by　pulsed　electroacoustic　method.　It　is　found　that　the　space　charge　injection　and　the　interfacial　traps　located　between　the　epoxy　and　paper　plays　an　important　role　in　determining　the　space　charge　dynamics.　The　results　reveal　that　below　353　K,　the　calculated　interfacial　charge　density　is　consistent　with　the　Maxwell-Wagner　(MW)　model,　while　above　353　K,　it　is　smaller　than　the　measured　value.　The　time　constant　during　charging　is　much　smaller　than　that　predicted　by　the　MW　model　and　the　space　charge　injection　showed　polarity　effect,　which　leads　to　the　interfacial　charge　densities　under　polarity　poling　voltage　not　being　equal.　It　is　proposed　that　the　interfacial　traps　and　space　charge　injection　should　be　responsible　for　the　observed　space　charge　dynamics.