To study the effects of tooling and construction parameters on the cutting of large-diameter reinforced concrete cantilever piles by shield tunneling, with a focus on a specific section of the project in Shaoxing, research on surface and structural deformations, modes of rebar failure, and tool wear was conducted. The results show that the strategy of 'slow thrusting speed, medium rotary speed, low torque, strict control of slurry, early reinforcement, and frequent measurement' successfully completed the pile cutting task. Rebar failure can be categorized into shear-pull, flexural-pull, and pure shear modes, with thrusting speed having a significant impact on the failure mode. Tool wear is approximately 2.1 to 2.4 millimeters, increasing with the radius of the trajectory, with the left side significantly higher than the right. For shield tunneling of reinforced concrete cantilever piles in soft-flow plastic strata, recommended excavation parameters are: 2～5 mm/min of thrusting speed, a disc rotation speed of 0.85 r/min, a thrust of 8500～9500 kN, and a disc torque of 1000～1500 kN·m. The research findings can serve as a reference for similar projects.