Architecture unit identification is the core of reservoir architecture characterization. However, it is difficult to identify the architecture interface for the sedimentary types of near-source rapid accumulation, complex lithology and rapid sand body superposition. It is necessary to study the means to improve the identification accuracy. In this paper, taking the slump turbidite sand body of Hanjiang Formation in EN Oilfield of South China Sea as an example, guided by the genetic mechanism of slump turbidite fan, on the basis of rock and mineral analysis, the Gamma-Density Comprehensive curve(GDC) is constructed by optimizing GR and DEN logging series, and the ability of electrical logging data to identify architecture units is further enhanced. The braided channel, channel flank, channel beach and interchannel units are identified, and the quantitative prediction formula of turbidite fan sand body architecture style and scale is established. The method can be used to study the architecture of other similar types(such as fan delta, underwater alluvial fan, etc.).