A rotary abrasive flow polishing device for integral impeller type parts comprises a feeding system, a spindle system, a device body, a clamp cover, a guide structure and a cleaning system, wherein the feeding system is used for regular bidirectional feeding and controlling abrasive flow, the spindle system is capable of rotating positively and reversely and adjustable in rotation speed, the clamp cover clamps an impeller to form a closed cavity and protects non-polishing sides and upper and lower edges, the guide structure is used for guiding abrasives, and the cleaning system is used for realizing cleanness in ingoing and outgoing. The rotary abrasive flow polishing device solves the problems of easiness in interference, over-polishing of blades, chamfering, dead angles and nonuniform polishing in polishing of integral impeller type parts, the abrasives can bidirectioally cyclically flow to be recovered easily, machining efficiency is improved, and cleanness in ingoing and outgoing during machining can be realized by means of the cleaning system used after polishing is completed.