The invention discloses a high-shear reactor with a feed distribution device. The high-shear reactor comprises a reactor shell, wherein a first feed pipe is arranged on the top wall of the reactor shell; a stator substrate is arranged on the inner surface of the lateral wall of the reactor shell; stator gear rings are arranged on the lower surface of the top wall of the reactor shell and the lower surface of the stator substrate; a main transmission shaft is arranged along the central line of the reactor shell; a rotor substrate is arranged on the main transmission shaft; a rotor gear ring is arranged on the upper surface of the rotor substrate; the stator gear rings and the rotor gear ring are engaged with each other; a discharge port is arranged on the lower end of the reactor shell; the inner surface of the innermost gear ring of a primary stator gear ring is fixedly connected on the periphery of the feed distribution device which is connected with a second feed pipe; and the second feed pipe passes through and is arranged on the top wall of the reactor shell. The reactor is suitable for a quick reaction system by which solid can be generated, can prevent quick growth of solid particles from plugging the reactor, and is particularly suitable for preparing organic isocyanate.