This　study　focused　on　the　effect　of　inserting　fins　into　metal　foam　on　the　solidification　rate.　To　this　aim,　a　well-designed　experimental　system　with　solid-liquid　interface　visualization　was　built.　Metal　foam　samples　with　different　fin　intervals　were　prepared　for　experiments.　Solidification　process　of　water　saturating　in　finned　metal　foam　under　bottom　cooling　was　experimentally　investigated.　Results　showed　that　inserting　fins　into　metal　foam　can　make　a　promotional　improvement　on　solidification　rate　of　water.　The　solid-liquid　interface　became　curved　after　inserting　fins,　compared　with　metal　foam　sample　without　fins.　Besides,　changing　the　interval　has　little　effect　on　the　solidification　rate.　Copyright　©　2018　Elsevier　Ltd.　All　rights　reserved.