Current research results of the DC cascaded system show that the system’s stability can be guaranteed when the system’s parameters are within specific ranges, which are similar to the results obtained from standalone DC-DC converters. However, DC cascaded systems are high order systems and the dynamic behaviors are more complex than their standalone counterparts. In this paper, we identify and analyze the bidirectional bifurcation phenomena in the current-mode controlled DC cascaded system. Based on the derived averaged model, the bidirectional bifurcation phenomena and the associated mechanism will be studied in depth.