The invention relates to a large-power V-shaped plasma torch. A cathode arm, an anode arm and a jet mixing chamber form a V shape. The cathode arm is formed by a cathode and a plurality of electrode assemblies. The anode arm is formed by an anode and a plurality of electrode assemblies. The cathode arm and the anode arm are installed on the jet mixing chamber. The plasma torch is of a V-shaped structure. The cathode and the anode are on two end points of the V shape, and the mixing chamber is located at the bottom of the V shape. During working, plasma arcs are excited by the cathode and the anode, pass through a plurality of channels composed of the electrode assemblies, merge in the jet mixing chamber, and form a stable V-shaped arc. The power of the torch is decided by the length of the V-shaped arc, and the arc length is determined by the number of the electrode assemblies. The structure helps to improve the power, the thermal efficiency and the life of the torch.