The front sand of fluvial induced delta front is the most active deposition in the delta facies, and also one of the most important reservoirs in our terrestrial basin. The distributary channel and mouth bar in the delta front interact each other, and its evolution may be classified into three stages. The planar evolution may result in the vertical depositional differences, and according to the depositional difference, location and well logging curves, the vertical depositional in the delta front may be divided into 5 types: the single distributary channel, upper distributary bar, upper bar distributary channel, isolated bar and superimposed bar. Based on the guidance of modern delta study and depositional mode, the delta front sand in Sha II member of Yonganzhen oilfield is analyzed thoroughly to ascertain the combination relationship of distributary channel and mouth bar, as well as the planar distribution.