The present disclosure discloses a flexible photoelectric device module and a method for preparing same. The module includes a plurality of photoelectric device units. One photoelectric device unit includes a bottom electrode, a functional layer and a top electrode; the bottom electrode includes a light-transmittance insulating base; and a first electrode, a second electrode and a third electrode which are arranged on two side surfaces of the base; the first electrode is a transparent electrode; the second electrode and the first electrode are in electric contact with each other; the second electrode and the third electrode are electrically connected through a conducting channel; the conducting channel runs through the base along a thickness direction; and the third electrode in one photoelectric device unit is electrically connected to the top electrode or the first electrode in another photoelectric device unit, so that the two photoelectric device units are disposed in series or in parallel. The present disclosure can greatly simplify the process for manufacturing a large-area flexible organic photoelectric device module to reduce the cost, improve the utilization rate of an effective area of the module, and ensure the photoelectric conversion efficiency of the module. For example, preparation of efficient large-area solar battery modules can be achieved.