The　characterization　of　the　stress　intensity　for　a　sharp　V-notch　in　creeping　solids　is　an　important　topic　as　it　is　a　preliminary　to　evaluate　and　assess　the　notch　contained　structure　at　elevated　temperature,　however,　it　is　not　investigated　in-depth　in　available　literatures.　In　this　paper,　the　C-integral　evaluation　for　the　sharp　V-notch　in　power-law　creeping　solids　is　studied　and　the　concept　of　notch　stress　intensity　factor　(NSIF)　is　extended　to　the　sharp　V-notch　in　creeping　materials　based　on　asymptotic　solution　of　sharp　V-notch　tip　field.　C-integral　of　a　sharp　V-notch　tip　is　demonstrated　to　be　dependent　on　the　integration　path　away　from　notch　tip　regardless　of　creep　extents.　A　novel　path-independent　C-V-integral　is　proposed　based　on　the　derivation　of　C-integral　and　the　concept　of　NSIF　for　sharp　V-notch.　A　numerical　method　to　determine　NSIF　as　well　as　C-V-integral　for　sharp　V-notch　is　presented　and　verified.　Typical　solutions　of　NSIF　and　C-V-integral　for　single　edged　sharp　V-notch　specimen　are　also　discussed　in　this　paper.　The　concept　of　NSIF　and　C-V-integral　presented　in　this　paper　is　very　promising　to　be　extended　to　characterize　fatigue　issues　in　further　investigations.