提出一种新的ＡＴＭ网业务模型，它去除了ＭＭＰＰ等信源业务模型中的泊松到达假设，更符合ＡＴＭ中业务的性质。它可以用于描述数据、语音、视频，甚至它们的复合业务流。给出了对这种模型进行排队分析的流体流分析法。最后以视频与话音业务的复合为例给出分析结果，并与仿真实验进行了对比，结果是令人满意的。 A new ATM network service model is proposed, which removes the assumption of Poisson arrival in the source business model such as MMPP, which is more in line with the nature of the business in ATM. It can be used to describe data, voice, video, and even their composite business flows. A fluid flow analysis method is presented for the queuing analysis of this model. Finally, the analysis result is given by taking the composite of video and voice service as an example, and compared with the simulation experiment. The result is satisfactory.