Through flume tests of uniform current and limited depth, this paper studies the influence of different cylinder pile clusters on the circumfluence. By contrast analysis of several groups of experimental data, we achieved the laws including the influence of different cylinder pile clusters on the uniform flow, the influential scope of different cylinder clusters on the flow filed, the difference of the influential feature and degree from different cylinder pile clusters on the same flow, the influential scope of different cylinder pile clusters on the flow field, the influences of the flow-obstructing ratio, the bents’arrangement and cluster length on the flow field, the reaction of flow with different velocity on the cylinder pile clusters, as well as the variation of flow velocity on the transverse section, etc. It is found that the drag of cylinder pile cluster is one but not the only one factor affecting the water flow, the arranging formats and up-flow angles of cylinder pile cluster have different influences on the variation of flow velocity, and the back is greater than the front factor.