Underground cable laying device and method

The invention discloses an underground cable laying device and method in the technical field of underground cable laying, and the device comprises a laying vehicle, the front end of the laying vehicle is fixedly connected with a retaining disc, the two sides of the circumferential surface of the retaining disc are rotatably connected with digging rings, the side surfaces of the digging rings are provided with slideways, and a connecting shaft is slidably connected between the slideways; excavating buckets are fixedly installed in the middle of the connecting shaft and located between the excavating rings, material receiving guide plates are fixedly connected between the excavating rings and between every two excavating buckets, opening doors are rotationally connected to the middles of the material receiving guide plates, double-side guide plates are fixedly connected into the retaining disc, and the excavating rings are sleeved with lifting rings. According to the automatic trenching backfilling wire burying