In　this　paper,　using　the　in-situ　nano-indentation　device　(SPM/SEM　hybrid　system)　to　test　the　micro-mechanical　properties　of　gamma＇　phase　and　eutectic　gamma＇　phase　which　along　＜001＞　direction　of　directionally　solidified　nickel-base　super-alloy.　The　hardness　and　modulus　of　the　eutectic　gamma＇　is　higher　than　gamma＇　phase.　For　the　specimen　ST　(without　aging　treatment),　the　elastic　modulus　and　hardness　of　the　gamma＇　phase　respectively　is　110.7GPa　and　1.45GPa,　the　elastic　modulus　and　hardness　of　the　eutectic　gamma＇　phase　respectively　is　171.2GPa　and　3.98GPa;　for　the　specimen　W-1000(aging　1000hours),　the　elastic　modulus　and　hardness　of　the　gamma＇　phase　respectively　is　105.4GPa　and　1.35GPa,　the　elastic　modulus　and　hardness　of　the　eutectic　gamma＇　phase　respectively　is　161.5GPa　and　3.85GPa.　After　long-term　high-temperature　aging　without　loading,　the　change　of　the　micro-mechanical　properties　of　gamma＇　phase　and　eutectic　gamma＇　phase　which　along　＜001＞　direction　of　directionally　solidified　nickel-base　super-alloy　is　not　apparent.　Meanwhile　the　results　of　the　FEM　are　in　good　agreement　with　the　results　of　the　experiments.