Abstract: In order to explore the law of viscosity temperature of narrow fractions of vacuum residue, the effect of temperature on viscosity of narrow fractions, which were extracted from Canada vacuum residue by supercritical fluid extraction and fractionation, were investigated in range of 60-120 ℃. The results showed that: (1) The viscosity of narrow fractions increased rapidly with the increase of the molecular weight. (2) With the increase of temperature, the viscosity of heavy fractions decreased faster than that of light fractions. (3) The Arrhenius equation could describe the relationship between viscosity and temperature. The range of flow activation energy was 61.06-98.42 kJ/mol. The activation energy increased with the molecular weight. (4) Arrhenius model could be testified by the Andrade equation, Vogel equation and Walther equation. This study had certain guiding significance for understanding of the viscosity-temperature law and model of residue oil.