The invention provides a novel prefabricated cantilever retaining wall by adopting a bolt block connection mode. A plurality of bolt blocks are prefabricated on the inner side of a prefabricated panel, reserved holes are formed in the bolt blocks, pre-buried connection bolts are preset in a prefabricated bottom plate, the prefabricated bottom plate is laid with bed mortar materials, after pre-buried connection threaded rods of the prefabricated bottom plate penetrates through the reserved holes of the control panel, nuts are fastened on the pre-buried connection threaded rods, the panel and the bottom plate are connected into an integral structure, and mortar grouting materials are poured in the reserved holes; and longitudinal connection between section segments of the retaining wall is connected through longitudinal reserved bolt holes and bolts formed in the control panel and the prefabricated bottom plate. According to the novel prefabricated cantilever retaining wall by adopting the bolt block connection mode, factory fabrication, transportation and field mounting are facilitated, maximum reduction of the connection of field steel bars is achieved, maximum reduction of the workload of concrete pouring is achieved, maximum shortening of concrete maintenance time is achieved, and the construction period of the retaining wall is effectively shortened; the strength and stability of wall connection can be ensured, the connection is reliable, the construction is simple, construction is facilitated, the quality of prefabricated member connection is easily ensured, and betterpromotional value is achieved.