马鞍山河段是长江中下游典型的顺直分汊河段，其演变过程较为复杂，整治难度较大。分析了该河段的河势特点及历史、近期演变情况，在此基础上结合该河段已实施的整治工程分析了工程的整治效果。并指出了目前马鞍山河段存在的问题，提出了整治措施及建群状丁坝来调整水流的整治思路。为马鞍山河段二期整治工程提供参考。

The Ma ' anshan reach of Yangtze River is a typically straight braided stretch, her evolution is rather complicated,and it is difficult to regulate. This paper first analyzes the historic and recent characteristics of this reach evolution. On this basis of analyzing the regulation effect in the light of implemented regulation project, the authors put forward the present main problems existing in the Ma ' anshan river reach and the regulation measures including a groyne group of adjusting the transitional reach mainstream, which may provide reference for the 2 stage regulation engineering.