This　paper　takes　the　heat　dissipation　problem　of　linear　Fresnel　concentrating　photovoltaic　devices　as　the　research　background,　this　paper　conducts　an　experimental　investigation　on　the　boiling　flow　characteristics　of　the　dielectric　liquid　R141b,　and　discusses　the　enhancement　effect　of　the　electric　field　on　the　foam　metal　porous　wall　microchannel　heat　sink.　In　this　paper,　the　effects　of　electric　field　strength　(applied　voltage)　on　wall　temperature,　heat　transfer　coefficient　and　critical　heat　flux　(CHF)　of　mini-channel　heat　sink　are　investigated.　The　bubble　departure　diameter　and　incipience　location　in　the　mini-channel　heat　sink　under　different　electric　field　strengths　are　recorded　using　a　high-speed　camera.　Combined　with　the　theory　of　electrohydrodynamic　(EHD),　the　behavior　of　bubbles　appearing　in　mini-channel　heat　sink　under　the　action　of　electric　field　is　analyzed.　It　is　observed　by　visualization　that　the　number　of　bubbles　in　the　channel　increases　and　the　volume　of　bubbles　becomes　smaller　under　the　electric　field　force.　Research　shows　that　when　the　voltage　is　200V,　the　heat　transfer　coefficient　of　the　mini-channel　heat　sink　increases　by　a　maximum　of　178%,　and　the　critical　heat　flux　can　be　increased　by　a　maximum　of　123%.　As　the　applied　voltage　increases,　the　wall　temperature　decreases.(c)　2022　Elsevier　Ltd.　All　rights　reserved.