Party building banner hanging device convenient to replace

The utility model discloses a party building banner hanging device convenient to replace, and relates to the technical field of propaganda facilities. According to the technical key points, the device comprises a base, the base is fixedly connected with two supporting blocks, the supporting blocks are fixedly connected with a first motor, the first motor is sleeved with a first rotating plate, the first rotating plate is fixedly connected with a first sliding block, a second rotating plate is additionally arranged, the second rotating plate is provided with a first sliding groove, and the first sliding block is slidably connected to the first sliding groove; a third rotating plate is hinged to the supporting block in the vertical direction, a second sliding groove is formed in the third rotating plate, the second sliding block is connected to the second sliding groove in a sliding mode, a third sliding block is hinged to the third rotating plate, a fourth rotating plate is additionally arranged, a third slidi