▎ 摘　　要

NOVELTY - The utility model claims a high-strength cutter head for shield machine, comprising a first cutter head and a second cutter head; the outer surfaces of the first cutter head and the second cutter head are coated with zirconium alloy coating; and the outer side of the zirconium alloy coating is coated with a tungsten carbide coating; the outer side of the tungsten carbide coating is coated with a titanium alloy coating; and the outer side of the titanium alloy coating is coated with a graphene coating; the inner surface of the first cutter head is provided with a mounting hole. The utility model is composed of a first cutter head and a second cutter head; the second cutter head is firstly connected with the soil layer or contact, when the second cutter head is damaged, the first cutter head starts to be with the soil layer or rock, contact as to prolong the service life of the whole; the graphene coating layer is set; the titanium alloy coating layer; tungsten carbide coating and zirconium alloy coating; the first cutter head and the second cutter head for four layers of wear-resistant protection, through the matching of the above structure, effectively improves the strength and service life of the whole cutter head.