Spraying control method for submarine cable laying machine

The invention relates to a spraying control method for a submarine cable laying machine. The spraying control method comprises the following steps: acquiring a relational expression between the ground breaking depth and the diameter of a nozzle, the soil layer strength, the spraying speed of the nozzle, the horizontal moving speed of the nozzle and the sprayed water flow pressure; the known soil layer strength and the preset ground breaking depth are substituted into the relational expression, and conditions needing to be met among the diameter of the nozzle, the spraying speed of the nozzle, the horizontal movement speed of the nozzle and the sprayed water flow pressure are obtained through calculation; the cable laying machine carries out construction according to the calculated parameters; and finally, the actual ground breaking depth is compared with the preset ground breaking depth, and the current cable laying machine can meet the construction requirement by increasing or decreasing one or more of the d