Terminal fan occur where sediment-laden streams decrease in size and vanish as a result of evaporation and transmission losses. They tend to form in arid or semi-arid region which is characterized by a moisture deficit. Mukerji et al. raised the sedimentological concept in the 1970s, however, in China, there has been no study in this aspect as yet. By the analyzing of well log data and careful core descriptions, terminal fan has been put forward on the 2nd to 3rd layer, Upper 2nd Sub-member,Shahejie Formation in the Pucheng oilfield for the first time in China. The model includes a tripartite zonation of terminal fan into proximal, middle and basinal zones. The main sedimentary microfacies of middle zones include distributary channel, mudflat and overbank. Distributary channel patterns are characteristic of terminal fan, and reflect both loss of stream power and spatially--temporally fluctuating discharge. The sedimentary model of the terminal fan is established; the sedimentary microfacies of the Pucheng oilfield are described in detail on the base of depositional sequence and sandbody geometry.