An　experimental　investigation　on　heat　transfer　characteristics　for　a　kind　of　micro　capillary　groove　evaporator　was　carried　out　in　this　paper.　HFE-7100　was　used　as　working　fluid.　This　kind　of　working　fluid　was　applied　for　all　three　evaporators　with　different　dimensions,　and　the　optimal　ratio　of　depth　on　width　of　micro　groove　for　the　evaporator　was　obtained.　A　maximum　heat　flux　of　200.49　W　was　successfully　transferred　while　maintaining　the　junction　temperature　at　86.18C.　The　experimental　results　show　that　this　kind　of　evaporator　could　be　capable　of　heat　dissipation　for　high　power　electronic　chips.