The utility model relates to a multi-stage large-drift-diameter annular throttling sand blower which mainly resolves the problems in the prior art that the number of construction layers is small, and the inner diameter of a sliding sleeve is small. The multi-stage large-drift-diameter annular throttling sand blower is characterized in that an inner step is arranged at the upper end of an upper connector (1) and is a ball seat (13), an outer thread of the lower end of the upper connector is connected with a coupling (2), an inner sleeve thread of the lower end of the coupling is connected with a central pipe (4), an outer thread of the lower end of the central pipe is connected with a sheath (7), the sheath is provided with an inner step, the upper end of the sheath is necked, a sand outlet (9) is formed in the wall of the central pipe (4), an annular part (11) is formed between the central pipe and the sheath and communicated with the sand outlet, a sliding sleeve (3) is fixed in the inner cavity of the central pipe through a pin (5), evenly distributed narrow seams are formed in the upper portion of the sliding sleeve and named elastic claws (12), and symmetrical windows (10) are formed in the middle of the sliding sleeve. The multi-stage large-drift-diameter annular throttling sand blower can realize six-layer fracturing without pulling string, is low in production cost and saves pump pressure.