Abstract: [Objectives] The tunnel catamaran is a special type of planing craft with two planing bodies connected in the middle channel. The central channel is lifted by a cyclone, which can lift the hull off the water surface and achieve a higher speed. It has good rapidity and can quickly enter a stable state during high-speed navigation. The parametric design and resistance performance estimation of the high-speed planing tunnel catamaran play an important role in the development and design of the catamaran. [Methods] The parameterized configuration of hull carried out by defining the main lines of planing tunnel catamaran hull with clamped B-spline curve.Then the influence of catamaran channel size and deadrise angle on hull resistance performance of catamaran is studied by setting of multiple hull designs in STAR-CCM+. [Results] The optimized hull design with 17.3% resistance reduction compared with the original is obtained.[Conclusions] Comparing with the same scale and displacement planing hull, it is proved that the high-speed planing tunnel catamaran has more excellent ship sailing performance under the medium and high-speed working conditions.