Nickel-based　alloy　with　excellent　high　temperature　resistance　and　corrosion　resistance,　has　been　widely　applied　to　aerospace,　nuclear　power　and　offshore　oil　industry.　Based　on　the　importance　of　nickel-based　alloy,　studying　the　liquation　cracking　of　weld　heat-affected　zone　(HAZ)　is　of　great　significance　to　resolve　the　above　problem.　Welding　process　has　a　direct　influence　on　welding　performance　of　nickel-based　alloy,　so　it　is　one　of　the　important　factors　to　lead　to　HAZ　liquation　cracking.　By　heat　treatment　processes,　the　susceptibility　to　liquation　cracking　can　be　reduced　because　of　expected　microstructure　and　properties　obtained.　Meanwhile,　the　microelements　in　base　metal　affect　the　non-equilibrium　segregation　behavior　of　grain　boundaries,　so　it　can　leads　to　the　generation　of　HAZ　liquation　cracking.　The　progress　on　liquation　cracking　of　weld　heat-affected　zone　of　nichel-based　alloy　are　reviewed　from　welding　processes,　heat　treatment　processes　and　micro-elements,　and　the　test　method　of　liquation　cracking　is　summarized.　The　future　research　trends　are　prospected.　©　2016　Journal　of　Mechanical　Engineering.