The invention discloses a high-shear reactor for a rapid competitive reaction. The high-shear reactor comprises a cylindrical shell, a rotor, a stator and a main transmission shaft. A discharging port is formed in the cylindrical shell, a first feeding pipe is arranged in the center of the end wall of the cylindrical shell, a cylindrical distributor is arranged at the tail end of the part, located in the cylindrical shell, of the first feeding pipe, and first discharging holes are formed in the side wall of the cylindrical distributor. Feeding stator teeth of a hollow structure are arranged between the innermost ring of rotor teeth of the first stage and the next inner ring of rotor teeth, and the hollow part is communicated with a second feeding pipe through an annular hollow structure. Holes are formed in the feeding stator teeth. According to the reactor, it can be avoided that multiple streams of materials make contact in a non-high-turbulence zone, the materials can be rapidly and evenly mixed within milliseconds, the defect that the mixing effect is poor in the interior body of the innermost ring of a rotor of a meshing type high-shear reactor can be effectively overcome, and on the premise that power consumption is not increased, the yield and quality of a target product can be effectively improved.