The invention belongs to the field of municipal construction, and particularly relates to a municipal underground pipeline partition construction device convenient to operate. The device comprises a columnar connecting part, the outer side walls of the two ends of the connecting part are fixedly sleeved with annular partition boards, round movable plates are arranged on the sides, away from the connecting part, of the annular partition boards, the round movable plates and the connecting part are in sealed connection through elastic rings, the side walls, close to the annular partition boards,of the round movable plates are fixedly connected with connecting rods, the ends, away from the round movable plates, of the connecting rods are fixedly connected with piston blocks made of magnetic materials, a mounting cavity is formed in the connecting part, an electromagnet is fixedly connected into the mounting cavity, the two sides of the mounting cavity are provided with sliding cavities communicating with the mounting cavity, and the piston blocks are arranged in the sliding cavities and are in sliding seal connection with the sliding cavities. Through the dual-layer seal elastic ring,the pipeline partition effect can be improved, placing is easy, the attaching degree of the device and the pipeline is high, and in addition, in the interior of the hidden with the dark light, the good warning effect is achieved.