The application of stratal slicing in lithofacies identification in a complex fault basin can accurately reflect and finely depict the distribution of depositional systems with amplitudes and abnormal structures in prospecting areas. Combining with results of detailed 3-D interpretation and 3-D visual technology, this stratal slicing technique was successfully used to identify the configuration of the lower Cretaceous Damoguaihe channel sands and develop characteristics of the lower Cretaceous Nantun depositional fan in Well Huo-1 area of northwest Beier Depression, Hialaer Basin.