In　order　to　solve　the　problem　of　poor　intergranular　corrosion　of　Ni　alloy　which　exists　in　welding,　a　new　flux-cored　wire　is　prepared　by　adding　a　small　amount　element　Ti.　Chemical　composition,　crystal　phase,　and　metallurgical　microstructure　of　deposited　metals　after　welding　were　analyzed　by　optical　microscope,　XRD　and　SEM.　The　intergranular　corrosion　resistance　was　investigated　by　the　test　method,　ASTM　G28　A.　The　result　shows　that　Mo　content　of　precipitates　which　mainly　exist　in　grain　boundary　is　more　than　that　of　substrate　in　deposited　metal　and　the　content　of　Ni　is　adverse.　The　separations　of　rich　molybdenum　phases　lead　to　the　existence　of　Mo-depleted　zones　in　their　vicinity,　which　will　experience　preferential　corrosion.　When　the　contents　of　Mo　and　Cr　are　the　same,　the　property　intergranular　corrosion　resistance　with　adding　trace　element　Ti　is　good,　which　explains　that　Ti　can　prevent　intergranular　corrosion　effectively.