本发明公开了一种微纳结构表面强化方法及高功率换热设备性能提升方法，本发明的方法包括以下步骤：步骤一、对原始基体材料换热表面进行预处理；步骤二、采用飞秒激光技术在预处理之后的换热表面上加工阵列分布的不同尺寸的“沟槽”微纳结构。本发明利用飞秒激光微纳米加工技术，在原始基体材料上构建不同尺寸阵列分布的“沟槽”微纳米结构，从而提升壁面的亲水性，实现临界热流密度的提高。

The invention discloses a micro-nano structure surface strengthening method and a high power heat exchange device performance improvement method. The method comprises the following steps: Step 1: Pretreat the heat exchange surface of the original substrate material; The second step is to use femtosecond laser technology to process the "groove" micro-nano structure of different sizes of array distribution on the heat exchange surface after pretreatment. The invention utilizes femtosecond laser micro and nano machining technology to construct "groove" micro and nano structures with array distribution of different sizes on the original matrix material, so as to improve the hydrophilicity of the wall surface and realize the improvement of critical heat flux.