The theory of slope break is a new achievement of sequence stratigraphy applied in continental basins. The former research showed that the slope breaks along source area direction are favorable for the generation of stratigraphic lithological t raps because of that the lowstand system tracts are easily developed in this area. The research on Chenjia Depression shows that mutual grade slope breaks are developed in the lower third member of Shahejie Formation. The controlling pat terns of the slope breaks in different depositional stages are different. Based on the slope breaks identification and the analysis of the relationship between the slope breaks and the favorable target traps, the controlling effect of the slope breaks opposing source area direction on sandstone distribution is proposed , especially in the middle and small faulted lake basins with rapid filling.