In　the　present　work,　effect　of　vanadium　on　mechanical　and　thermal　fatigue　resistance　of　Cr5　deposited　metal　is　investigated.　It　is　found　that　hard　phases　with　rich　vanadium　are　mainly　distributed　at　grain　boundaries.　Vanadium　affects　the　high　temperature　tensile　strength　and　thermal　fatigue　cracking　obviously.　With　the　increase　of　vanadium　content,　high　temperature　tensile　strength　of　deposited　metals　shows　a　initial　rise　up,　then　drop　for　more　than　0.54　wt.%　V.　Toughness　and　high　temperature　plasticity　are　increased　up　to　0.26　wt.%　V,　then　drop　up　to　0.89　wt.%　V,　then　toughness　and　plasticity　increase　again.　Moreover,　the　thermal　fatigue　crack　length　shows　a　initial　decrease　up　to　0.26　wt.　%　V,　then　slightly　rise　up　for　0.89　wt.%　V,　then　crack　length　shorten　again.　It　is　expected　that　the　optimal　vanadium　content　is　in　a　range　of　0.18　similar　to　0.26　wt.%　for　resisting　the　thermal　crack　growth.　Fractographic　observation　shows　that　the　thermal　fatigue　cracks　mainly　are　transgranular　growth.　It　is　felt　that　the　crack　length　is　closely　related　to　microstructure,　oxidation　resistance,　toughness　and　high　temperature　plasticity　of　the　deposited　alloy.