The invention discloses a manufacturing process of chromium bronze conducting bars for an asynchronous traction motor rotor, belongs to the technical field of motor conducting bar preparation, and particularly relates to a continuous up casting technology of chromium bronze materials and a continuous extruding technology of the chromium bronze materials. The manufacturing process comprises the steps of continuous up casting for preparing copper bars, continuous extruding, cold drawing, thermal treating and machining. The continuous up casting technology is adopted for preparing chromium bronzecopper bars, the chromium bronze copper bars are subjected to continuous extruding to obtain conducting-bar extruded profiles, the extruded conducting-bar profiles are subjected to cold drawing deformation and aging treatment, and then the rotor conducting bars can be obtained. Compared with a traditional manufacturing method of the chromium bronze conducting bars for the asynchronous traction motor rotor, the manufacturing process has the advantages that the produced conducting bars are excellent in performance and stable in quality, continuous operation can be achieved, and the material utilization rate is increased; and scale production can be achieved.