The invention provides a multifunctional ring main unit based on an intelligent monitoring device. The multifunctional ring main unit comprises a cabinet body shell, a rear plate, a threading hole, movable support frame structures, mounting holes, rainproof heat dissipation frame structures, support rods, a mounting mesh plate, a wire distribution frame structure, a through hole, an induction dispersion fire extinguishing frame structure, a protective cover, a box door, a transparent observation window and rubber strips; the rear plate is in bolted connection with the rear end of the cabinet body shell; the threading hole is formed in the right side of the lower part of the inner side of the rear plate; the movable support frame structures are arranged at the lower part of the cabinet bodyshell. According to the multifunctional ring main unit based on the intelligent monitoring device of the invention, a vertical plate, a wire inserting groove and a stop block are adopted, a wire is placed on the inner side of the wire inserting groove, the stop block is inserted into the inner side of the wire inserting groove, so that the wire is fixed to the inner side of the wire inserting groove; when a worker maintains equipment installed in the cabinet body shell, a fault wire and a corresponding connection port can be conveniently and rapidly found, and maintenance time is saved.