The invention discloses a design method for submarine cable burial depth requirement answering anchor damage. The method comprises the following steps: a, according to conditions of a submarine cable burial sea area and anchor tonnage, determining an anchor type and parameters of a boat anchor; b, according to the conditions of a submarine cable burial sea area, and the anchor type and parameters of the boat anchor, calculating speed of the boat anchor when contacting a water surface; c, calculating speed of the boat anchor when contacting a seabed surface layer; d, calculating in-soil depth of the anchor when the anchor passes through the seabed surface layer until the anchor stands still; e, according to seabed soil survey, determining whether an anchor dropping soil layer is a hard soil layer, if not, directly executing the next step, if yes, based on the in-soil depth of the anchor, increasing fluke downward holding length; f, calculating deep burying margin increased by sluicing influence; g, obtaining a design value of submarine cable deep burying. After the design method designs laying of a submarine cable, defects in the prior art can be effectively overcome, to eliminate damages which may cause to the submarine cable by anchoring of ships.