There are several rows of water holes at the bottom of buried device, parallel distributed on both sides, during operation, with each hole to the seabed while a high pressure jet of water at the same time, rushing the seabed sediment, forming submarine trench. There is a fairlead at the upper device, used to guide the fiber optic cables to the bottom of the submarine trench, the gullies will be automatically filled by tide. The buried device is towed forward by construction vessels, and making various instructions through the work of the cable. Cable laying machines generally do not have underwater buried equipment, laid on the seabed surface by the weight of submarine cable.