介绍对竖直矩形窄通道进行的池沸腾实验研究。对四种不同的通道尺寸，分单面加热和双面加热共进行了8组实验工况。通过可视化观测和测量数据处理，得到如下结论：在窄缝中，汽泡生长受到空间尺寸限制，沸腾区压力有别于一般情况下的沸腾；矩形窄缝对沸腾有强化作用；双面加热情况下，过热度明显减小。 The experimental study of pool boiling in vertical narrow rectangular channels is introduced. Eight groups of experimental conditions were carried out on four different channel sizes, one-sided heating and two-sided heating. Through visual observation and measurement data processing, the following conclusions can be drawn: in the narrow gap, the bubble growth is limited by the space size, the pressure in the boiling zone is different from the boiling under normal circumstances; the rectangular narrow slit enhances the boiling; Under the superheat significantly reduced.