在空气－水两相流试验台上，对水平放置集箱的Ｕ型和Ｚ型并联管系统中的两相流流量分配特性进行了理论和实验研究．着重对水平并联管中两相流流量分配规律进行了理论上的分析和推导，得到了计算各支管流量的计算式，并用实验进行验证，其计算结果和实验结果符合较好．研究结果对两相流并联管束的工程设计具有重要的参考价值． On the air-water two-phase flow test bed, theoretical and experimental studies on the flow distribution characteristics of two-phase flow in U-type and Z-type parallel pipe systems with horizontal headers are carried out. The theory of flow distribution in two-phase flow in horizontal parallel pipe is emphatically analyzed and deduced. The formula to calculate the flow rate in each branch is obtained and verified by experiments. The calculation results are in good agreement with the experimental results. The research results have important reference value for the engineering design of two-phase flow parallel pipe bundle.