The invention discloses a stamping die of inner convex rib of a one-way clutch transmission sleeve, comprising an upper die base and a lower die base in guide connection through a guide pole. The stamping die is characterized in that: a strip-shaped convex die is mounted at the lower end of the upper die base; the lower die base is fixedly provided with a mounting base with an arc-shaped slot; a rotary shaft is provided with a concave die cavity matched with the convex die; the end portion of the rotary shaft is connected with a locating chuck with locating grooves distributed at the periphery; a locating pin matched with the groove is mounted at the end portion of the lower die base; a transmission sleeve to be processed is sleeved outside the rotary shaft; both the rotary shaft and the transmission sleeve are arranged in the arc-shaped slot of the mounting base; and the locating pin is matched with the locating groove. The invention adopts a one-stamping manner to shape the transmission sleeve simply, and satisfies the tolerance requirement of top circle and root diameter of the transmission sleeve.