The invention discloses a multifunctional rebar conditioning device for draught fan base construction. The multifunctional rebar conditioning device comprises a tool box, a control plate, an electriccontrol box, a workbench, a fixed cutting mechanism, box doors, a baffle, a bending shaft, a push plate, moving wheels, a first electric push rod, a fixed beam, a distance measurement mechanism, a supporting beam, a discharging mechanism, an angle sensor and a PLC; the moving wheels are fixed to four corners of the bottom of the tool box through bolts; the box doors are connected to the positions,corresponding to the two side inner walls, of one side of the tool box through hinges; the workbench is fixed to the center of the top of the tool box through bolts; the supporting beam is fixed to one side of the top of the workbench through bolts; the discharging mechanism is fixed to the top of the supporting beam through bolts; the electric control box is fixed to one side of the supporting beam through bolts; and the control plate is embedded in one side of the electric control box. The multifunctional rebar conditioning device is simple in structure and convenient to use, the rebar bending efficiency is effectively improved, and the using convenience is effectively improved.