The invention discloses an induction motor cage type rotor structure which comprises a rotor iron core, and a plurality of grooves used for installing copper strips are uniformly formed in the surfaceof the rotor iron core. Limiting grooves larger than the grooves are formed in the notches of the grooves, groove wedges are arranged in the limiting grooves and tightly press copper strips in the grooves. The grooves with a shape that the notch width is not smaller than the width of the groove bottom are adopted, and efficient machining of the grooves is achieved. Meanwhile, limiting grooves aremachined in the notches, and groove wedges arranged in the limiting grooves are used for compressing and fixing the copper strips placed in the grooves. The copper strips do not need to be welded byadopting a hot isostatic pressing welding (HIP) method. The dependence on expensive HIP equipment is avoided, and the manufacturing cost of the high-speed asynchronous motor is reduced.