The utility model discloses an efficient separation spiral chute, and belongs to the technical field of iron ore separation equipment. The separation effect of the spiral chute is improved. The technical scheme includes that a plurality of excitation coils and a power supply device for supplying stable alternating current for the excitation coils, magnetic and weakly magnetic particles in ore pulp can be periodically aggregated and scattered by a stable alternating magnetic field, layering and zoning quality of the surface of the chute is effectively improved, and qualified concentrate and tailings are finally obtained. The spiral chute with the additionally mounted excitation coils can directly separate the qualified concentrate and tailings when the ferrous content of separated ores reaches more than 5%, so that inner circulation of a large number of middlings and re-separation of medium and strong intensity discarding tailings are avoided. The efficient separation spiral chute is simple in structure and convenient to use, has obvious advantages as compared with an existing spiral chute, and can be popularized and used in an industry. Separation effects are remarkably improved, and production cost is reduced.