The utility model discloses a high shear reactor for quick competing reaction, including cylindric shells, rotor, stator and final drive shaft, be provided with the discharge gate on cylindric shells, the central point of cylindric shells one end end wall puts and is provided with first inlet pipe, and final drive shaft is terminal, the inside of inner circle rotor tooth is provided with radial flow impeller, and it is inside for hollow structure's feeding stator tooth 2 between the inner circle rotor tooth of the first order and time inner circle rotor tooth to set up, the hollow portion of feeding stator tooth 2 passes through 11 interior cyclic annular hollow structure 12 and 10 intercommunications of second inlet pipe of end wall, be provided with discharge opening 9 on the feeding stator tooth 2. The utility model discloses a reactor can avoid two strands of materials in non - high turbulence district's contact effectively, makes the stream thigh of following central feeding can obtain the back mixing that the material had just been avoided to bigger kinetic energy, makes two strands of materials reach the homogeneous mixing at millisecond class. Avoid the emergence of side reaction, improve the yield by a wide margin, it is with low costs, easy operation.