This paper presented the law of resistance transverse distribution in braided river，which is one of the key factors to study on the evolution rule of braided river. On the base of analyzing the characteristic of braided river, it is found that resistance transverse distribution is closely related to the great change discharge flood, different situation of riverbed composed by sand of small grain diameter and the landform change. According to the observed data from braided reach of Yellow River, the formula of resistance transverse distribution in braided river had been established after the relation and the law between above-mentioned three factors and resistance in the river has been confirmed. Compared with the observed data and the computed value, it is shown that the formula can represent the law of resistance transverse distribution in braided river.
