Deltas, controlled by different dynamical conditions, are characterized by different plane shapes, distribution frequencies and dimensions of sand bodies. In order to quantitatively characterize the major dynamical conditions of lacustrine deltas, the authors divided the lacustrine deltas into four types on the basis of relative strength of hydrodynamic force. According to the quantitative analysis of measured outcrop columnar section, Sangonghe Formation was assigned to fluvial influenced-wave dominated braided river delta front, while Xishanyao Formation was considered to be of wave influenced-fluvial dominated braided river delta front. Three types of sand bodies were mainly developed in these two kinds of delta front, which are underwater distributary channel, river mouth bar and sheet sand.