The invention discloses a subway tunnel shield end reinforcing method. The subway tunnel shield end reinforcing method comprises the following steps of reinforcing the shield end head, reinforcing thewater supply pipe and reinforcing the bridge pier, and the shield end reinforcing method is reinforced by using a high-pressure rotary spraying pile with Phi 800@600, the water supply pipe reinforcement and the bridge pier reinforcement are reinforced through a sleeve valve pipe. The reinforcing method has the advantages that the reinforced soil body has good uniformity, self-supporting propertyand water stopping property, the non-lateral limit compressive strength of the reinforced soil body is not less than 1 Mpa, and the permeability coefficient is less than 1.0*10 <-5> cm/s, no large bump or settlement exists on the ground after the soil body is reinforced, the construction period is short, and the safety of subsequent construction is ensured.