CO2在微细通道内流动沸腾换热过程所具有的临界热流密度(CHF)对于其换热系数有着重要影响。根据国内外现有发表的公开文献的实验数据分析了质量流量、饱和温度、管径等对临界热流密度的影响,并对理论模型与试验数据进行误差分析。发现Bowring预测关联式对小于3 mm管径内临界热流密度预测精度较高,在30%误差范围内可以达到70%预测精度,Wojtan预测关联式具有较小的平均绝对误差。提出了今后CO2在微细通道内沸腾换热CHF的研究方向。 The critical heat flux density (CHF) of CO2 flowing in the micro-channel boiling heat exchange has an important influence on the heat transfer coefficient. The influence of mass flow rate, saturation temperature and pipe diameter on the critical heat flux density is analyzed based on the experimental data of published literatures at home and abroad. The error of theoretical model and experimental data is analyzed. It is found that Bowring predictive correlation predicts higher prediction accuracy of critical heat flux density in less than 3 mm diameter, 70% prediction accuracy in 30% error range and Wojtan predictive correlation with smaller average absolute error. In the future, the research direction of boiling and exchanging heat CHF in fine channel was proposed.